1 of 12 Todd Williamson/WireImage.com
You Know Him From: The star of daytime soaps such as General Hospital and The Bold and the Beautiful also made his mark in prime time with the original Melrose Place, where he met his on-again, off-again girlfriend Heather Locklear.
2 of 12 Jordan Strauss/WireImage.com
You Know Her From: The former child star is best known for playing spunky pioneer girl Laura in Little House on the Prairie and is the half sister of actress Sara Gilbert (Roseanne). In adulthood, she served two terms as the president of the Screen Actors Guild.
3 of 12 John Sciulli/WireImage.com
You Know Him From: He made the geeky, flood-pants-wearing Steve Urkel popular in the '90s sitcom Family Matters.
4 of 12 Mike Marsland/WireImage.com
You Know Her From: The Czech American retired tennis legend was once ranked as the No. 1 player in the world. Her Grand Slam record includes 18 singles titles, 31 women's doubles titles and 10 mixed doubles titles.
5 of 12 NFL/Getty Images
You Know Him From: He's a wide receiver for the Green Bay Packers.
6 of 12 Jeff Kravitz/FilmMagic.com
You Know Her From: This soul singer is best known for her early career in Motown with the act Gladys Knight & the Pips and in her solo career has collaborated with numerous other singers, including Dionne Warwick, Stevie Wonder and Elton John.
7 of 12 Jason Merritt/Getty Images
You Know Him From: The rapper and Disney star plays Sander Loyer in the Camp Rock franchise and portrays Ty Blue in the network's original series Shake It Up!
8 of 12 Jim Spellman/WireImage.com
You Know Her From: The comedian and actress is currently one of the five co-hosts on ABC's daytime talk show The View.
9 of 12 Henry S. Dziekan III/WireImage.com
You Know Her From: The former pageant queen is the co-host of Extra with Mario Lopez.
10 of 12 JB Lacroix/WireImage.com
You Know Him From: The singer-songwriter is best known for his songs "Chariot," "Follow Through" and "I Don't Want to Be," which has been featured as the theme song to The CW's One Tree Hill.
11 of 12 Christian Augustin/WireImage.com
You Know Her From: A former model, this Welsh mezzo-soprano has crossed over from opera to performing a range of music, including hymns, musical theatre and popular songs, such as an Italian-language version of Dolly Parton's "I Will Always Love You."
12 of 12 Alexander Tamargo/WireImage.com
You Know Him From: This Cuban-American model-turned-actor has appeared in Univision's telenovela Triunfo del Amor and as Jennifer Lopez's love interest in her music video, "I'm Into You."