Daughters of Hollywood: Mamie Gummer
Photo: Vera Anderson/WireImage.com

Lily Rabe and Jill Clayburgh Lily Rabe
Parental guidance: Actress Jill Clayburgh (Running with Scissors) and playwright David Rabe (Hurlyburly). 
Seen in: No Reservations (July 2007). 
Blockbuster potential: In her Broadway debut (Steel Magnolias ), she outshone her acting veteran castmates, including Delta Burke, Marsha Mason, and Frances Sternhagen.

Zoe and Lenny Kravitz Zoe Kravitz
Parental guidance: Rocker Lenny Kravitz and Cosby Show sweetheart Lisa Bonet. 
Seen in: The Brave One (September 2007). 
Blockbuster potential: Kravitz dazzled industry insiders when she appeared on the cover of the French fashion mag Jalouse. It helps when both your parents have the knockout-looks gene.

Elettra rossellini wiedemann Elettra Rossellini Wiedemann
Parental guidance: Actress Isabella Rossellini and former model Jon Wiedemann. 
Seen in: Lancôme advertisements (following in her mother's footsteps). 
Sneak preview: Yes, we know she's not an actress yet, but given her lineage (Grandma is legend Ingrid Bergman), we give it a few years, max. You heard it here first.

The Travoltas Ella Bleu Travolta
Parental guidance:
Actors John Travolta and Kelly Preston (Jerry Maguire ). 
Coming attraction: Unnamed Travolta family project. 
Blockbuster potential: She's young, but so was Dakota Fanning when she hit it big with I Am Sam. Dad recently announced plans to star with Ella in a family-friendly film. Hey, it worked for Will and Jaden.