Having gotten his start in numerous small roles in film and television, he landed his role as nerdy genius Sheldon Cooper in 2007. Jim Parsons will now take your questions
The Teach for America founder has a new book, A Chance to Make History. Wendy Kopp will now take your questions
The Oscar-nominated actress stars in Blue Valentine. Michelle Williams will now take your questions
The Wikipedia founder celebrates his website's 10th anniversary Jan. 15. Jimmy Wales will now take your questions
The director's latest film, Black Swan, is generating Oscar buzz. Darren Aronofsky will now take your questions
The Oscar-winning actor stars in TRON: Legacy and True Grit. Jeff Bridges will now take your questions
The Fed chairman was TIME's 2009 Person of the Year. Ben Bernanke will now take your questions
The Black Swan author's latest, The Bed of Procrustes, is a book of aphorisms. Nassim Taleb will now take your questions
As our TimeFrames issue reconsiders the recent past, we asked futurist Ray Kurzweil for his prediction of what's to come
Harry Potter and the Deathly Hallows Part 1 premieres Nov. 19. Emma Watson will now take your questions
The author's new book, Luka and the Fire of Life, is out Nov. 16. Salman Rushdie will now take your questions
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