Both Charlie Sheen's wife and Jenna Jameson had twin boys recently; they join the growing ranks of celebrity parents with multiples, including Julia Roberts and Brangelina.  When these little twin bundles of joy grow up, will they be the next Mary-Kate and Ashley Olsen? Or will one seek fame while the other chooses a quieter life? That's the path taken by a number of celebrities and their not-so-famous twins. In fact, we were surprised to find out how many stars have a twin sibling leading a very different life.

01. Scarlett and Hunter Johansson



 Scarlett Johansson might have been e-mail buddies with then-Senator Barack Obama, but her twin brother Hunter helped get him into the Oval Office. In June 2008 ScarJo's twin left his job as a community organizer at Manhattan Borough President Scott Stringer's office and became a campaign organizer for Obama in Denver. As everyone knows, Obama became President, while Hunter received an honor of his own: People magazine named him a "Hot Bachelor" in their "Single and Sexy Men of 2008" feature.

03. Ashton and Michael Kutcher



 Ashton Kutcher is a dashing (albeit goofy) leading man and the most famous cougar cub in history, but few people know that he has a fraternal twin. Michael Kutcher was born with cerebral palsy and had a life-saving heart transplant when he was 13-years-old. Always his twin's protector when the two were growing up, Ashton decided to move to Hollywood to pursue his acting career, while Michael stayed in Iowa and sells retirement plans.

05. Giovanni and Marissa Ribisi



 When future actors Giovanni and Marissa Ribisi were born, they were delivered by Bibbe Hansen. Giovanni grew up to play Phoebe's brother, Frank, Jr., on "Friends" and Scarlett Johansson's photographer-husband in "Lost in Translation." Marissa appeared in "Dazed and Confused," "The Brady Bunch Movie," and "Felicity" before launching her own clothing line, Whitley Kros. And Bibbe Hansen? She ended up becoming Marissa's mother-in-law, when Ribisi married Bibbe's son, Beck Hansen, who is better known as indie rock darling Beck.