Photo Flash: Nicolas Dromard, Carrie Manolakos, Leah Horowitz & More Rehearse for DREAM THE IMPOSSIBLE DREAM

Broadway leads Nicolas Dromard (Mary Poppins), Carrie Manolakos (Mamma Mia) and Leah Horowitz (Follies) will join 15 other Broadway and Hollywood performers in helping to kick off the inaugural season of the Transcendence Theatre Company's Broadway Under The Stars in Jack London State Park concert series this summer in Sonoma, California tomorrow, July 14. Check out the stars in rehearsal in the photos below!

The Broadway concert taking place in the heart of wine country, is set in the historic and breathtaking open-air winery ruins of Jack London State Park and is playing an important part in keeping the historic park from the previously slated closure. $5 from each ticket will be a contribution toward the preservation of this majestic park.

Nicolas Dromard recently finished headlining the Broadway and 1st National Touring Companies of Mary Poppins as "Bert". He is best know in Northern California for playing the prince, Fiyero, in Wicked during its year and a half stay in San Francisco.

Carrie Manolakos who played "Sophie" in Mamma Mia on Broadway and Elphaba on the tour of Wicked, was recently positioned in the top 100 of the iTunes pop charts with her debut album "Echo." She became an internet sensation with her haunting performance of Radiohead's classic "Creep", recorded in April of this year

Leah Horowitz, known for playing "Cosette" in the revival of Les Miserables and for playing the role of Young Heidi in the recent revival of Follies, will join the cast directly from her run of Folliesat the Ahmanson Theatre in Los Angeles.

The full cast scheduled to appear in the concert includes: Ron DeStephano, Nicolas Dromard (Mary Poppins), Jeff Edgerton (Parade), Melissa Giattino (42nd Street), Leah Horowitz (Follies), Nicole Mangi (Gypsy), Carrie Manolakos (Mamma Mia), Steve Mazurek, Amy Miller (42nd Street), Tinuke Oyefule, Wendy Rosoff (42nd Street), Sheri Sanders, Darryl Semira (Mamma Mia), Leah Sprecher, Stephan Stubbins (Mary Poppins), Brad Surosky, Brooke Tansley (Beauty & The Beast), Rachel Thomas.