Bride Hard.

Sam is a secret agent whose toughest mission to date is pleasing her bride-to-be best friend at a lavish destination wedding. When a team of mercenaries crashes the party and takes the guests hostage, Sam is thrown into a fight unlike any before — one where she can’t risk blowing her cover or ruining the big day. As she takes on the bad guys in a high-stakes battle disguised as a fairy-tale affair, she realizes the real threat might be closer than she thinks.