Chloe has lost its status as the most chosen name for baby girls for the first time in seven years.
Some names are inspired by celebrity choices
Emily takes the top spot in England and Wales with Ellie second and Chloe forced into third place.
In the National Statistics survey Jack stayed the most popular name for boys, an honour it has held for nine years.
Alfie was one of the big climbers in the boys' chart, with Robert dropping out of the top 50, and Freya was the highest new entry in the girls' chart.
Many of the sudden bursts in popularity for names relate to those chosen by celebrities, although actresses Emily Watson and Emily Mortimer are unlikely to have been behind Emily's triumph in this year's statistics.
Boys' top 10
But Eastenders star Shane Richie - who plays pub landlord Alfie Moon - may take some of the credit for Alfie rising 31 places to number 18.
He told BBC News Online: "Alfie is such a warm, lovable and friendly name that it's no wonder mums and dads-to-be see the charm in it."
And Poppy - which went up 20 places in the girls' chart to number 43 - may owe some of its success to Jamie Oliver naming his daughter Poppy Honey in March 2002.
Harrison, rising five places to 47, suggests there is still interest in veteran film star Harrison Ford, and Tyler, rising five places to number 35 after Tyler Hamilton's heroics with a broken collarbone in last year's Tour de France. Harvey's rise of 10 places to number 36 comes at a time when So Solid Crew's MC Harvey has garnered a little fame.
Outside the top 50, there is Kian, boosted by Kian Egan of Westlife, Logan, Wolverine's name in the X-Men movies, and Mackenzie, as in The Office's Mackenzie Crook.
Girls' top 10
Also featuring are Malachi, as in Fame Academy star Malachi Cush, Roman, as in Chelsea's Russian billionaire Roman Abramovich, Ashton, as in Dude Where's My Car? star Ashton Kutcher, and Xander, a character in cult television series, Buffy the Vampire Slayer.
Isabel, Isabella, Daisy and Aimee were all big risers in the girls' chart, with Jade and Nicole amongst those falling despite celebrity associations.
For the eighth year running, the top five boy's names, Jack, Joshua, Thomas, James and Daniel, remained virtually the same, with their place order unchanged since 2002.
In Wales, Joshua and Megan topped the charts and there were places in the top tens for the likes of Dylan, Rhys, and Ffion.
In Scotland both Jack and Chloe were toppled, with Lewis and Emma replacing them and distinctive names such as Cameron, Kyle and Callum figuring prominently.
Northern Ireland's most popular names of 2003 were announced on January 2. Jack replaced Matthew as the most popular boy's name while Chloe - commonest girl's name for six years - was replaced by Emma