Sister Act
Continue clicking to see some of the sisters, both old and young, who share the stagelights.
The Olsen Twins
Ashlee and Jessica Simpson
Younger sis Ashlee (born in 1984) released her first pop album in 1984, accopanied by a reality TV series. She has since done more recordings and concert tours.
Ali and Lindsay Lohan
Sister Ali (Aliana) also began modeling as a child and made cameo appearances in several of her older sister's movies before landing an acting job of her own. She released a Christmas album in 2006.
Britney and Jamie Lynn Spears
Younger sis, Jamie Lynn, appeared in her sister's movies and music videos until she got an acting gig of her own on Nickelodeon.
Vanessa and Lynn Redgrave
Lynn, who starred on TV in "House Calls" and was a Weight Watchers spokesperson, has been nominated for three Tonys and an Oscar. Her most recent movie is "The White Countess" with Vanessa's daughter, Natasha Richardson.
Natasha and Joely Richardson
Joely is known to American audiences as Julia McNamara in TV's "Nip/Tuck." She also stars with Timothy Hutton in "The Last Mimzy."
Penelope and Monica Cruz
Her younger sister, Monica, started her career as a dancer but now has an acting role in a Spanish TV show.
Roseanna and Patricia Arquette
Patricia, who has appeared in many movies including "Ed Wood" and "Fast Food Nation," is best known for playing Allison DuBois on TV's "Medium," a role for which she won an Emmy.
Haylie and Hilary Duff
Younger sis Hilary Duff is TV's "Lizzie McGuire." She also has appeared in movies, including "Material Girls" and "Cheaper By The Dozen." A pop singer, she has three platinum albums to her credit.
Paris and Nicky Hilton
Nicky (Nicholai) has appeared in several movies with her sister but is best known as a fashion model and designer.
Liza Minnelli and Lorna Luft
Lorna, who has acted on stage, is known primarily as a singer and currently tours with a program of her mother's most famous songs.
Jennifer and Meg Tilly
Her younger sister Meg, a classically trained dancer, appeared in "The Big Chill" and "Psycho II." She won a Golden Globe and was nominated for an Oscar for her role in "Agnes of God."
Beyonce and Solange Knowles
Solange got her start as a dancer for her older sister's group Destiny's Child. She has made several TV appearances and is working on her debut album.
LaToya and Janet Jackson
The youngest child, Janet is a Grammy-winning singer and Oscar-nominated actress. She also holds the record for most Soul Train music awards.
Sienna and Savannah Miller
Younger sister Savannah also began as a model and is now making a name for herself as a fashion designer in the U.K.
Rain and Summer Phoenix
Her younger sister Summer is also a TV and movie actress. She has appeared on stage with her husband, Casey Affleck, and Matt Damon and has had roles in "ER," "Growing Pains" and "Murder, She Wrote."
Dakota and Elle Fanning
Her younger sister Elle appeared in several of her movie's as a younger version of Dakota's character but soon Elle was getting parts of her own. Her movie credits include "The Door in the Floor," "Deja Vu" and "Babel."
Venus and Serena Williams
Serena has embarked on an acting career, most notably appearing in episodes of "ER" and "Law & Order."
Eva and Zsa Zsa Gabor
Younger sister Eva, who died in 1995, is best known for her role on TV's "Green Acres." She also appeared in dozens of movies and voiced characters in Disney animated films.