Fred Claus is one of the movies that will be keeping you entertained at the cinema this Christmas.
It's a modern-day fairytale about the rivalry between Santa and his misunderstood brother, Fred.
Ellie caught up with the film's stars - Vince Vaughn (who plays Fred) and Paul Giamatti (who plays Santa).
Here's what they had to say.
What was it like playing Santa's brother?
Vince: That was a big honour. I'm a big fan of Santa Claus.
I didn't realise that Santa had a brother called Fred.
The film made me have a lot of respect for what Santa has to go through. I don't think that those reindeers get enough credit - the miles they have to do!
What was it like playing Santa?
Paul: I had a good time.
I knew that I was going to have to wear a belly, big fake hands and a beard.
It was quite hard to move around. I couldn't stay in the costume for more than 45 minutes - and then they would have to get me out of it.
But there were people giving me milkshakes and stuff to help cool me off!
What does the film tell you about your brothers and sisters?
Vince: They are our best friends. Sometimes, when we are younger, you compete for your parents' attention. But as you get older, you realise what a great friend you have.
Paul: It's a good idea to get along because they are going to be around all the time.
Tell us about Santa's factory
Paul: It's HUGE. There's lots of stuff, including rooms where they make candy canes and other rooms where they make Christmas ornaments.
I didn't even get to see it all, it was so big!
What's the film like?
Vince: It has a great feeling to it. I don't want to give too much away, but there's a nice take on the naughty and nice list.
It seems there's a new way of doing things these days!