Experiencing your first kiss may have been thrilling, weird or downright gross, but everyone agrees it's an unforgettable rite of passage. Whether you were a kid or much older, the first kiss is one that sticks with you, regardless of the path you choose in life. Even movie stars remember their first kisses. For some, it may have even occurred onscreen. For Mila Kunis, life has come full circle. She recently got engaged to the person who bestowed her first kiss onscreen – her costar on That '70s Show, Ashton Kutcher. She was just 14 at the time and told People magazine in 2001, "I was like, 'Oh, he's so cute, it's the Calvin Klein model!' Then I was like, 'I have to kiss him?' I was so nervous and uncomfortable. I had the biggest crush on him." For Justin Timberlake and Britney Spears, matching denim outfits weren't the only thing they shared – Spears claims Timberlake laid one on her at the tender age of 13. Another Disney darling got started even earlier – on the set of her dad's show, Doc, Miley Cyrus put her tongue to good use on Tyler Posey, her costar.
Posey says the two dated for two years and broke up at age 11. For other stars, their first smooch wasn't so idyllic. "I was 12 years old and had to kiss this guy who was gross and never brushed his teeth," Jessica Alba said. "It was the most disgusting thing in my whole life," Leonardo DiCaprio said of his first. "The girl injected about a pound of saliva into my mouth, and when I walked away I had to spit it all out." Brooklyn Decker also had a big problem with waterworks, describing "a lot of slobber" and summing up the experience as "not good." Brad Pitt's first buss was all business. He describes his fourth-grade kiss as "a business deal."  "We made a plan to meet in her garage and kiss. It was like this business deal. I go right up to her, kiss her. Then I ran home." Hey, at least she has a good story about her famous first kiss...