The Ravinia Festival 2010 will also feature a Sondheim Gala celebrating the 80th birthday of composer Stephen Sondheim.

Directed by Lonny Price, the July 31 benefit evening will boast the talents of Tony Award winners LuPone, Audra McDonald, George Hearn and Michael Cerveris, who have all been featured in Ravinia's Sondheim celebrations since they began in 2001..

Source: http://www.playbill.com/news/article/137737-Ravinia-Festival-2010-to-Feature-LuPone-Mitchell-OHara-McDonald-Cerveris