Putting his best foot forward.

A somber-looking Ben Affleck was pictured leaving a restaurant in Beverly Hills, Calif., on Friday night — only hours after photos of his ex-wife Jennifer Garner and John Miller kissing in public emerged online.

The “Accountant 2” star exited Steak 48 wearing a gray cardigan over a blue button-down shirt and dark jeans tucked into his beige boots.

Shortly before Affleck’s outing, the “13 Going On 30” star was seen locking lips with her longtime boyfriend.

Photos shared by TMZ on Friday showed Garner passionately kissing Miller in a steamy embrace outside his Los Angeles home on Thursday.

The “Alias” alum, 53, wore a casual blue plaid shirt and black pants while making out with Miller, 47. She also clutched her keys and a phone during the hot encounter.

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