Entertainment Tonight ET Online ETOnline.com

Joseph Gordon-Levitt and Emily Blunt shared their enthusiasm for their trippy new time-travel thriller Looper at Comic-Con this weekend, with Joe saying, "It's more Chris Nolan than Michael Bay."

Video: New Trailer: Joseph Gordon-Levitt's Wild 'Looper'

"If you like a fun time and a bangin'-ass movie, you'll get that," promises Joe. "If you also like a more grown-up drama, you'll also get that. It's one of those movies."

In Looper, time travel exists in the future -- but it will be illegal and only available on the black market. When the mob wants to get rid of someone, they send their target 30 years into the past, where a "looper" -- a hired gun, like Joe (Gordon-Levitt) -- is waiting to mop up. Joe lives the good life with his job as a looper – until one day the mob decides to "close the loop," sending back Joe's future self (Bruce Willis) for assassination. Will he kill himself, or team up to get revenge?

"She's a really tough chick from the Midwest," says Emily about her character, unable to reveal more without any spoilers.

Video: Joseph Gordon-Levitt's Trippy Time Travel Thriller

Written and directed by Rian Johnson, Looper also stars Paul Dano and Jeff Daniels. The movie time travels into theaters September 28.