Gina Carano, the lethal mixed-martial-arts pro turned action star in Steven Soderbergh’s “Haywire,” partied like a champ at Sons of Essex on Wednesday. Co-star Ewan McGregor made a perfunctory pit stop after the premiere, but Carano reveled till 1 a.m., even though she had a 6 a.m. flight.

HAYWIRE: LOTS OF ACTIONS, SO-SO CLIMAX

“She could take out this entire room right now,” exclaimed Dean Winters, often bloodied in Allstate ads, at the Cinema Society/BlackBerry Bold bash.