MCC Theater (Robert LuPone, Bernard Telsey, William Cantler, Artistic Dirs; Blake West, Executive Dir) has confirmed that its previously announced benefit reading of a new Neil LaBute play, Reasons to be Pretty Happy, will be led by Paul Rudd, Amber Tamblyn, Norbert Leo Butz & Jennifer Mudge.. The one-night-only World Premiere developmental reading is now set for Sun Sept 11 at 7:30 PM at the Lucille Lortel Theatre, and will benefit the nonprofit’s education and playwright development programs. (This replaces the previously announced date of Mon June 20.) Set on the night of their 20th anniversary high school reunion, Reasons to be Pretty Happy follows Greg and Steph as they revisit their home town after having moved to New York. Kent and Carly are suspicious of their reasons for returning and the four friends dance (sometimes literally) through a series of encounters at their school gym as they try to rekindle old friendships, struggle with their futures (together and separately) and reveal secrets to one another that might have been better left buried beneath a pile of yearbooks. Additional casting will be announced at a later date.  For more info, visit www.mcctheater.org. Press contact: DKC/O&M (212/695-7400)...