Harry has overtaken Oliver to become the most popular boys' name in Britain, according to new research.
Oliver lost the top spot just a year after it took the crown from Jack, which had held first place for 16 years.
Possible inspirations for the rising popularity of the new No 1 name include Harry Judd, the McFly drummer who won this year's Strictly Come Dancing, Harry Potter and Prince Harry.
In the girls' list, Olivia kept top spot despite strong competition from Lily which climbed one place to second. Sophie slipped from second to third place.
Tommy was the biggest climber among the boys' names, springing from 131st place last year to 66th this time round, an improvement of 65 places.
Jackson also made huge leaps, rising from 128th in 2010 to 75th.
Among the higher rankings, Riley is now becoming very popular, climbing 16 spots from 25th to ninth place.
Jenson rose 30 places from 99th to 69th, presumably driven by the success of F1 racer Jenson Button.
The list was compiled from a national survey of 434,756 babies born to members of the Bounty Parenting Club in 2011.
Lisa Penney, spokeswoman for Bounty.com said: ''Our records show that parents are continuing to be influenced by popular culture and celebrity fads.
''Today's baby name trends are changing more quickly and names that seem relatively unusual and quirky can quickly become mainstream and common in the classroom.
''For example, ten years ago the name Ruby was relatively unheard of as a baby girl's name, yet these days Ruby is regularly ranked in the top 10.
''Likewise for boys, a decade ago the name Riley would have rarely been considered, yet this year it's also leapt into the top 10 most popular boys' names.
''Common baby naming tips often warn against calling your baby something too trendy, unpronounceable or difficult to spell.
''But, in general whatever name you give your child they always grow up to make it their own."
Among the girls, Eliza is the biggest climber leaping from 141st to 84th. Willow also enjoyed a good year climbing 31 places from 108 to 77.
Sofia rose from 78th to 53rd, while Julia, which has only been in the top 100 for five years, leapt 22 spots to 63rd.
Bella and Esme, characters played by Kristen James Stewart and Elizabeth Reaser respectively in teen Vampire films Twilight, have both risen substantially this year.
BABY GIRL NAMES 2011
BABY BOY NAMES 2011