02/22/2006 at 08:35 AM EST
Lindsay Lohan is asking to be taken seriously, and she wants fans to stop dwelling on her party-girl image.
"I hate it when people call me a teen queen," the 19-year-old star tells Allure magazine in a new interview.
After making her name with Freaky Friday and Mean Girls, Lohan's next roles will be in more mature movies. This June she will be seen opposite Meryl Streep, Lily Tomlin and Tommy Lee Jones in Robert Altman's A Prairie Home Companion, and she recently shot Chapter 27, about the death of John Lennon, starring Jared Leto.
She, too, has become more mature, she says. The past year "felt like five lifetimes because I've grown up a lot. I know better what to do and what not to do. I lost sight of the people and things that are most important to me."
As for her look, Lohan says: "Sometimes being that thin doesn't look healthy. I kind of didn't realize that. ... I lost weight when I was in the hospital, and then I wanted to keep it off."
Lohan was hospitalized last year for what was said to be exhaustion. "It was an attention thing, too," she explains, adding: "You start to wonder if your friends are your friends because you look a certain way."
As for her long-ago breakup with Wilmer Valderrama – no biggie. "I know now that I don't need a boyfriend," she says.