Matt Smith made his debut in the new series of Doctor Who - episode one had its world premiere in Cardiff.
Fans are now waiting for the new series to hit our TV screens on the 3 April.
The Eleventh hour will see Matt team up with new companion Amy Pond played by actress Karen Gillian.
But just how much are you looking forward to the new show?
Are you a big fan of Matt? Or do you think the shoes of David Tennant are just too big to fill!?
Unfortunately this topic is now closed but there are Comments pages on other subjects on the main Chat index.
"I can't wait for Doctor Who to start again. I am the biggest fan ever!"
Sky, 12, London, England
"I think that you can't top David Tennant, sorry Matt!"
Ollie, 12, Middlesbrough, England
"I think that Matt's very good. Wishing for David Tennant to come back is not realistic. I'm very excited."
Claire, 12, Dublin, Ireland
"I am a huge fan of Doctor Who! David Tennant is the best Doctor in the world but I think Matt is trying to copy him, which is annoying. I'm going to miss David Tennant."
Emma, 11, Birmingham, England
"I am so excited and cannot wait for the new Doctor Who!"
Nico, 6, Suffolk, England
"It looks good. The trailer is good and I'm looking forward to the computer game."
Sean, 12, Knowsley, England
"I am looking forward to Doctor Who but I will miss David Tennant as the Doctor!"
Laura, 13, County Kilkenny, Ireland
"No I'm not because I liked David Tennant a lot."
Megan, 10, Carmarthenshire, Wales
"I think David Tennant is the best doctor there has ever been. I think Matt Smith has a lot to live up to."
Laura, 14, Devon, England
"David Tennant was the best Doctor ever and no-one can ever replace him! Matt Smith won't be very good in my opinion but things could change. If the Eleventh Hour isn't good I'm not even going to say 'Doctor Who' ever again."
Fern, 9, Birmingham, England
"I can't wait to see the new Doctor Who."
Caolan, 7, County Armagh, N. Ireland
"I think Matt Smith will be good but I don't think anyone will be better than David Tennant."
Maddie, 9, Oxfordshire, England
"I am looking forward to the new Doctor. People, give him a chance and be nice!"
Andrew, 11, Sussex, England
"Matt is going to be brill. He is probably in my top five greatest Doctor's. Good luck Matt!"
Tom, 13, Chester, England
"I'm looking forward to Matt, as the new writer and a new Doctor sounds promising. Matt has a good voice for the Doctor, as it isn't too different to David Tennant's."
Christopher, 12, Chester, England
"I CAN'T WAIT! I love Doctor Who. It's my fave programme ever and the game will be amazing, but I wish it was David Tennant."
Henry, 11, Northampton, England
"I am looking forward to watching the new Doctor Who because it looks exciting. I can't wait!"
Katie, 11, Salisbury, England
"I think that the next Doctor Who will be sooo good, I can't wait! I love it!"
Sarah, 12, Portsmouth, England
"I think Matt Smith is trying to make himself like David Tennant. I think it would work better if he created a completely new image of the Doctor!"
Rebekah, 13, Isle of Wight, UK
"I am really excited about the new Doctor Who! Daleks back, Weeping Angels, Vampires and more!"
Jacob, 8, Manchester, England
"We are not happy with the new Doctor because we liked the old Doctor! His voice was really good for the character and he was a handsome chap!"
Isla & Paige, 11, Rochdale, England
"No. We want David Tennant back!"
Jacob, 8, Lincolnshire, England
"It's going to be BRILL. I can't wait! David Tennant was the best but I think it will still be FAB!"
Sam, 11, Yorkshire, England
"I'm not too sure if Matt Smith will be as good as David Tennant, but I'm sure that he will be good."
Martha, 10, Hereford, England
"I am really looking forward to the new Doctor Who because the clips on the Christmas Special episode revealed that he is a very good Doctor. This new series is going to be awesome."
Jake, 11, Hereford, England
"David Tennant was the best Doctor ever! My mummy bought me DVD's of the other Doctor Who's and Tennant is the best. I don't think anyone can ever be as good, but can't wait to see him try!"
Brandan, 6, Southampton, England
"I can't wait. I keep thinking it's going to be on this weekend but it isn't."
Avril, 13, Southend, England
"I am really looking forward to it."
Priyesh, 13, London, England
"I'm really looking forward to the new Dr Who."
Jayson, 8, Leicester, England
"Matt Smith looks fantastic! As a long time Doctor Who fan I was never keen on David Tennant's Doctor. Steven Moffat is the new head writer which means the show will improve a lot. Russell T Davis changed Doctor Who too much, but Steven Moffat will go back to the basics."
Sam, 12, Norfolk, England
"I am the biggest Doctor Who fan in the world and I can't wait until the new series. I'm quite sad about David leaving and if Matt isn't good then it'll just ruin the show."
Lewis, 11, Angus, Scotland
"I am looking forward to the new Doctor. I hope it is really good."
Himat, 12, Slough, England
"Of course I'm looking forward to it! How can you not be? The Eleventh Hour is on telly a week on Saturday, the day I get my pocket money!"
Ibbo, 10, York, England
"Why Matt Smith? I am 100% sure David Tennant is much better!"
Katie, 9, London, England
"I think Matt Smith will be as good as David Tennant because everyone thought David Tennant wasn't as good as Christopher Eccleston but he was."
Dominic, 12, London, England
"Some people aren't?! I'm counting down the days! Don't forget that there's a new writer too, Stephen Moffat, who wrote my favourite episode, Forests of the Dead."
Claire, 12, Dublin, Ireland
"I can't wait for the new series, I'm practically jumping up and down in excitement. I am really going to miss David Tennant playing the Doctor but I'm sure Matt Smith will be awesome as well! I'm so excited!"
Jasmine, 13, Birmingham, England
"I love watching Doctor Who. I really miss David Tennant and I'm not sure Matt Smith can replace him."
Maria, 14, London, England
"I am a MASSIVE fan of Doctor Who, so I can't wait for the new series!"
Keelin, 9, London, England
"I can't wait for Doctor Who to start again but I will really miss David Tennant, he was such a brilliant doctor!"
Amber, 14, Lancaster, England
"I am really looking forward to the 11th doctor."
Stefan, 10, Cardiff, Wales
"I like Doctor Who but I don't think the 11th doctor looks as good. I'll still watch it though."
Irfan, 11, Leicester, England
"I am Doctor Who mad! I am really looking forward to it coming back on the telly but Matt Smith doesn't sound like he will match up to David. I hope he is good otherwise Doctor Who is ruined for me!"
Abbie, 12, Essex, England
"I am not sure. David Tennant was a brilliant actor so he will be hard to replace."
Becky, 11, Bradford, England
"I am a massive Whovian and my friends, my sister and I can't wait for the new series although I was really upset when David left! Now I have an excuse to wear my fourth doctor scarf!"
Zoe, 12, Kent, England
"I'm really excited about the new Dr Who."
Saif, 12, Slough, England
"I won't be watching Dr Who anymore as I loved David Tennant and I really miss him. Matt will never fill his shoes."
Alex, 11, Somerset, England
"I'm really looking forward to it but I hope they don't change it too much. It's been really incredible since its return and I wouldn't want it to lose that."
Izzi, 13, Essex, England
"I am looking forward to it and I'm trying not to judge him yet - we have only seen him in the advert and the last few seconds on The End Of Time. So people, wait until the Eleventh Hour and we'll see!"
Ella, 14, England
"I'm so excited."
Eve, 12, Stockport, England
"David Tennant was the best Doctor Who ever and he definitely played the part perfectly. I am not impressed by Matt Smith but I hope he will grow on me."
Annie, 12, Surrey, England
"I think Matt Smith won't be as good as David Tennant."
Jessica, 8, Lincolnshire, England
"I think it is going to be great ."
Ryan, 8, Dundee, Scotland
"I really am not keen on Dr Who."
Lily, 10, Glasgow, Scotland
"The new Doctor looks like he is good but we will have to wait and see."
Joe, 9, Oxfordshire, England
"I love David Tennant and I think it will be a hard job for Matt Smith to replace him, but I'm going to give him a chance."
Ada, 11, London, England
"Personally, I hope that Matt Smith will do well in his part as the new Doctor Who. Good luck Matt! Nevertheless, I think that David Tennant was the best!"
Maria, 10, Buckinghamshire, England
"David Tennant was a very enthusiastic Doctor but I'm sure Matt will be just as good."
Connor, 10, London England
"How can you say he isn't good? I think he will do very well and you never know, he may be better the David Tennant!"
Hannah, 11, West Sussex, England
"I can't wait for Doctor Who to be back on but it just won't be the same without David. I'm not even sure I'll like it as much."
Ellie, 13, Surrey, England
"I love Doctor who but I am not looking forward to watching it any more."
Chloe, 10, Bristol, England
"I'm really not impressed by him and I loved David Tennant I'm hoping he'll grow on me and Karen Gillian is pretty."
Alana, 12, London, England
"Matt Smith looks brill and I hope he does really well. He has big Converse to fill."
Fleur, 12, Cornwall, England
"I think Matt Smith will be quite a good Doctor Who."
Oscar, 8, Lancashire, England
"I can't wait , but I am going too miss David Tennant."
Sinead, 13, Lancashire, England
"He looks like the worlds most geeky bloke ever."
Charlie, 9, Leicestershire, England
"I think the new doctor will be great even though I liked the old one."
Immanuel, 9, West Lothian, Scotland
"I am incredibly excited about doctor who coming back - I have full trust in Matt, who I think will be just as brilliant as David Tennant. Bring on series five."
Ruthie, 14, Surrey, England
"I always watch Doctor Who and I am looking forward to seeing the new episodes."
Shiraz, 14, London, England
"I am not very excited about Dr Who as I will really miss David Tennant as he is a brilliant actor, but i hope Matt will do just as well."
Chantal, 11, Essex, England