ACTRESS SEPT. 9
Williams, who plays a troubled high schooler on Dawson's Creek, is happy to leave her adolescence behind. "If you really take yourself back to being a teenager," she told the Orlando Sentinel last year, "there is a lot of angst. Your life is full of humiliation and tumult. It's one hell of a ride."
ACTRESS APRIL 1
"Most 20-year-olds begin ruining their lives now, partying all the time," says Phillips. "I got that all over with already. I want to get married, be a mom. I haven't had the best structure in my life. I want structure."
FIRST DAUGHTER FEB. 27
"She's gone from being a little girl to a polished young woman, and she's done so with grace and good humor," says former White House press secretary Dee Dee Myers.
TENNIS PRO SEPT. 30
"I have to learn a lot about life and being an adult," Hingis told Tennis Magazine last year. "I'm not there yet."
ACTRESS FEB. 12
"I love the idea of rebellion," Ricci told the Los Angeles Times in November. "I don't know how I'm going to keep that alive when I'm in my 20s."
TENNIS PRO JUNE 17
"At 20, she has a better game," says Bart McGuire, CEO of the Women's Tennis Association. "And limitless potential."
SINGER OCT. 24
"When I turned 19, I still said I was 18, because I was promoting an album then and it was embedded in my brain to say I was 18," says the pop star. "During one interview, my mom tapped me and said, 'Sweetie, there's no need to knock off years this early!' I'll have to get comfortable with actually saying 20."