07/06/2012 02:18 pm ET

Famous Siblings: Celebrities Who Have Brothers, Sisters In Hollywood (PHOTOS)

Brad Pitt may have worldwide fame, but have you heard of Doug Pitt? No? Sounds about right.

Doug, who is Brad's young brother, stars in a new video for Virgin Mobile Australia, where he is touted as "the second most famous Pitt in his family." (We wonder how the brothers' young sister Julie feels about this title.) In the clip, Doug gives a tour of his house, cooks up some lasagna, and goes on a bike ride -- pretty run-of-the-mill activities for a run-of-the-mill guy, whose brother Brad just happens to be super famous.

"While his brother lives the life of a Hollywood A-lister, Doug's life is a little different," the ad's narrator proclaims. "Virgin Mobile believe in a fair go for all, and want to give Doug a taste of his brother's lifestyle, starting with his first-ever celebrity endorsement."

Doug may not be in the spotlight often, but that's not the case for many other celebrity siblings. From the Olsen twins and their younger sister, Elizabeth, to Hollywood familes including the Jacksons, Baldwins, Arquettes, and, yes, even the love-to-hate-them Kardashians, sometimes star power just runs in the family.

Check out Doug's video above and then check out photos of some famous siblings below. If his endorsement deals keeps rolling in, maybe we'll include Doug Pitt in the next go-around:

Did we leave off your favorite celebrity siblings? Tell us who we should include in the comments below!