Kate and Pippa Middleton Have "Friendly Rivalry"
Good-natured scene stealing is nothing new for Pippa Middleton.
Although Duchess Kate and her suddenly-famous younger sister and Maid of Honor, 27, are "best friends" according to one family friend, that doesn't mean they're unlike most siblings. "There is a healthy competition between the two," royal watcher Katie Nicholl says in the new Us Weekly.
"Certainly when it comes to looks, like who is the slimmest or better looking, there is a little friendly rivalry."
Kate, 29, and Pippa squabble over "weird things," says a family source. "You'd see them fight over who had the worst headache or period pain!"
And it's no wonder that Pippa has grabbed headlines for her sexy, elegant style, her chemistry with Prince Harry during the royal wedding -- and startling pics of her partying in a purple bra and a white bikini.
"She was the sister who sparkled," Nicholl, author of The Making of a Royal Romance, says. "She is an extrovert, compared to Kate."
Indeed, as fellow students at posh boarding school Marlborough College, "none of the guys noticed Kate," a source says. When Kate began attending St. Andrews in Scotland (where she met Prince William), Edinburgh student Pippa frequently visited to mingle with her sister's noble new pals.
"She dated a couple of the St. Andrew's lads and tried to get in with a lot of William's friends," the source says. "She wasn't sleeping around, but she flirts with the most well-connected men."
For much more on all the Middletons -- Pippa's wedding plans (and Harry's!), Kate's dreams of a baby, and whether Kate "chased" her Prince -- pick up the new Us Weekly, on stands today.
- Brad Pitt's Changing Looks
- Hollywood's Hottest Dads
- Mark Wahlberg's Shirtless Looks
- Prince William & Duchess Kate's Cutest Couple Moments
- Stars with tattoos of other celebs
- Brooke Shields' Changing Looks
- Carrie Underwood's Evolving Looks
- 'Fast & Furious 6' Cast Yearbook Photos
- Worst Celeb Sunburns
- Celeb Twins
- Celebs Who Work Out on the Beach
- Country Music's Hottest Couples
- Worst spring wardrobes
- Leonardo DiCaprio's Romance Retro
- WATN: 'Boy Meets World'
- Tim McGraw's changing looks
- Craziest Kim Kardashian pregnancy rumors
- Celebs Who Look Like Their Pets
- Mariah & Nick's Matching Style
- Hollywood's Tomboys
- The Royal Couple's Favorite Sports
- Kim Kardashian's Curvy Maternity Style
- WATN: 'Jurassic Park'
- January Jones' Retro Looks
- The Rock's Soft Side
- WATN: 'Veronica Mars'
- WATN: 'Beetlejuice'
- Fergie's Changing Looks
- Star Twitter Quitters
- Hollywood's Hottest Ryans
- Insured Celebrity Body Parts
- Most Expensive Celeb Engagement Rings
- Sweetest Celeb PDA
- Kim Kardashian's Tightest Looks
- Olivia Wilde's Best Street Style
- Justin Timberlake's Many Looks
- Hottest Royal Beach Bodies
- Celebrity Pets with Famous Names
- Michelle Williams' Best Fashion Moments
- Lindsay Lohan's Changing Looks
- Justin Bieber's Changing Hair
- Most Awkward People on the Red Carpet
- WATN: '7th Heaven'
- Ke$ha's Worst Looks
- Worst Oscar Fashion
- George Clooney's Oscar Dates
- Most Embarrassing Celeb Splits
- Stars Before They Were Oscar Nominees
- Jennifer Lawrence's Best Fashion Moments
- Rihanna's Sexiest Grammy Style
- Drew Barrymore's Craziest Looks
- Jennifer Aniston's Changing Looks
- Worst Dressed Celeb Designers
- Anne Hathaway's Oscar Looks
- Grammy's Hottest Couples
- Taylor Swift's Best Grammy Fashion
- WATN: 'Wonder Years'
- Destiny's Child's Most Iconic Looks
- Best Off-Season Bikini Bods
- Emma Stone's Best Red-Carpet Looks
- Celeb Flashers
- Mariah Carey's Biggest Feuds
- Mariah Carey's Wacky Wardrobe
- Britney Spears' Wackiest Red Carpet Poses
- Celeb Makeup Mistakes
- Ryan Gosling's Leading Ladies
- Nicole Kidman's Golden Globe Fashion
- Katy Perry's Year as a Single Gal
- Celebs Who've Removed Romantic Tattoos
- Most Memorable Celeb Holiday Cards
- Five of the Worst Celeb Winter Wardrobes
- Jennifer Aniston & Justin Theroux's Romance Retro
- Stars Who Are Aging in Reverse
- Christina Aguilera's Worst Looks
- 2012's One Hit Wonders
- Celebs Without Makeup
- Best and Worst Beach Bodies of 2012
- 2012 Fashion Don'ts
- Craziest Beauty Trends of 2012
- Celebs Who Survived Cheating Scandals
- The Turkeys of 2012
- Kristen Stewart's Best Red Carpet Moments
- WATN: 'Less Than Zero'
- Star Couples Who Went from Friends to Lovers
- The Most Famous Celebrity Pets
- The Hottest Celebrity Halloween Costumes
- WATN: 'I Know What You Did Last Summer'
- Jessica Biel's White Hot Red Carpet Style
Demi Lovato drops some major newborn scoop about Selena Gomez's family on today's Celebs Gone Social.Watch Video »
Check out some of Kim Kardashian's tightest outfits.Watch Video »
Best Bikini Bods
From Jennifer Lawrence to Rihanna, see the best off-season celeb bikini bods.Watch Video »
Two months after major marital problems, Ozzy and Sharon do a Hollywood date night on Celebs gone Social.Watch Video »
See how this country cutie has changed her looks over the years.Watch Video »
See how this former Calvin Klein model's looks have changed over the years.Watch Video »
From Videos of Wonderwall
From Crowd Ignite