Jennifer Garner geared up for a big night out with a coffee stop in Brentwood yesterday afternoon. The actress kept her daywear casual in a long-sleeved shirt and a pair of gray Toms, but hours later, Jennifer took a turn for the bold in a red hot Monique Lhuillier gown to join Ben Affleck at his Argo premiere. Argo doesn't come out until next Friday, but Jen's latest movie, Butter, hits theaters today. Neither the film's release, nor a glamorous evening, could distract Jen from her morning errands. She slipped back into her Toms this morning as she and her youngest, Samuel Affleck, started the day off with an errand in Pacific Palisades.