Jennifer Garner’s husband Ben Affleck may be beefing up for his upcoming role as Batman, but the actress proved that she is just as toned and fit during a stunning appearance on the red carpet last night.

Garner stepped out to host the 5th Annual Thirst Gala in Beverly Hills, Calif., wearing a chic black keyhole jumpsuit that bared her sculpted arms and svelte figure. She completed her head-to-toe black ensemble with simple heels, diamond earrings, and a diamond bracelet, pulling her hair back into a polished low ponytail. Garner’s flattering ebony jumpsuit was perfect for the evening event, and we’re loving her easy summertime look.

Want more style inspiration? Check out celebrities rocking  jumpsuits in our gallery!