Jennifer Garner: 'So Nervous' at 'Butter' Premiere!

Jennifer Garner catches a flight out of Toronto, Ontario, Canada on Tuesday (September 14).

The 39-year-old actress and expectant mama had been at the Toronto International Film Festival, where she premiered her latest film, Butter!

Jennifer recently told ET Canada that she was incredibly nervous about how the film would be received.

“I was so nervous. It was a crowd of 2000 people in this huge theater and I was gripping the director’s arm waiting for the first laugh – and once that happened…it made me feel like the audiences are going to get what we were going for, because they laughed at everything they laughed the little stuff, the big stuff – they seemed to have a blast!” she said.

15+ pictures inside of Jennifer Garner leaving Toronto and heading back to LAX…