Blood Is Thicker Than Power: Celebrity Siblings You Didn't Know About

Jessica and Joshua Alba: The acting bug didn't just hit the "Sin City" actress. Her brother Joshua has appeared in "Alpha Dog", "Monk", and his sister's first big break "Dark Angel". (GETTY)

Benjamin and Peter Bratt: Benjamin Bratt is known for his movies and Law and Order days, but his brother Peter is a filmmaker who won the 2000 Rockefeller Foundation Film/Video/Multimedia Fellowship for his film "Follow Me Home". (GETTY)

Julian and Joaquin Castro: Both politicians, Julian and Joaquin Castro are identical twins! Julian was the Mayor of San Antonio before becoming the United States Secretary of Housing and Urban Development. Joaquin, on the other hand, is a member of the House of Representatives in Texas' 20th district. (GETTY)

Penelope, Monica and Eduardo Cruz: Academy Award-winning Spanish actress Penelope Cruz has appeared in films such as "Vanilla Sky", "Vicky Cristina Barcelona" and "Volver." Her sister, Monica, is also an actress, but in lesser-known films. Monica did stand-ins for her sister while Cruz was pregnant during the filming of "Pirates of the Carribean: On Stranger Tides." Their brother, Eduardo, went a different route as a composer for "On Stranger Tides." So all three worked on the same movie together! (GETTY)

Mario, Jose and Lincoln Diaz-Balart: The Diaz-Balart Brothers are also close in careers. Mario is currently a member of the U.S. House of Representatives in Florida's 25th District. His older brother, Lincoln, was a member of the U.S. House of Representatives in Florida's 21st District before Mario took over for him. The middle brother, Jose, is an anchor on Telemundo and hosts the 10 a.m. news hour on MSNBC. (AP)

Jennifer and Lynda Lopez. Superstar singer and actress Jennifer Lopez isn't the only family member well known in the media. Her sister, Lynda, is a former journalist who worked in radio and television in New York City and Long Island. She now works for her sister in Los Angeles. (GETTY)

Demi Lovato and Madison De la Garza. Demi Lovato is an actress and singer famous for the Disney show "Sonny With A Chance" and "The X Factor," as well as songs such as "Give Your Heart A Break" and "Heart Attack". Her sister, Madison De la Garza, is a child actress who appeared on "Desperate Housewives" and the cancelled "Bad Teacher." (GETTY)

Linda and Loretta Sanchez. Both members of the U.S. House of Representatives, Linda Sanchez is from the 38th District of California, and Loretta is from the 46th. (GETTY)