Sacha Baron Cohen
Borat creator Sacha Baron Cohen wasn't technically barred from attending the 2012 Oscars ceremony - at least, not as himself. Given his promotional antics for his political satire film The Dictator that year, however, the Academy refused to have him attend or present if he showed up in character.
He ignored their request and hit the carpet that year in full Dictator mode, even going so far as to spill the jokingly referred-to "ashes of Kim Jong Il" on Ryan Seacrest.
He's attended the ceremony plenty of times since then alongside wife Isla Fisher, so it seems he didn't face any major consequences afterwards.
.jpg "How Comms Guru & Founder Of The PR Net Lisa Smith Put Her Stylish Stamp On The Industry")
.jpg "Who Are The Assoulines? Meet The Chic First Family Of Luxury Publishing")
.jpg "Who Is Nats Getty? The Oil Heir & Trans Activist Is Living Life Loud & Proud")
.jpg "Worldly Socialite Haya Maraka's Elegant Etiquette Tips For The Modern Lady")
.jpg "Haute Hostess Christine Chiu's Guide To Throwing The Most Fabulous Fête")
.jpg "All The Wild, Glamorous & Most WTF Moments From The Oscars After-Party")
.jpg "All The Wild, Glamorous & Most WTF Moments From The Oscars After-Parties")