The Ted 2 star revealed in an earlier post that she donated to Locks of Love, a non-profit organization that provides hairpieces to disadvantaged children under 21 suffering from medical hair loss, with this adorable photo of her dog Finn wearing her newly cut strands.
"Finn is wearing my #locksforlove," she wrote.
It's safe to say Amanda's new 'do looks amazing -- check her out walking Finn in New York City, with her voluminous style looking extra healthy in the candid shot.
Amanda clearly cut off a sizeable amount of inches from her hair, judging by her past shoulder-length hair she was rocking last month.
ET caught up with Amanda and her Ted 2 co-stars Mark Wahlberg and Seth MacFarlane in June, when they played a hilarious game of "Never Have I Ever." Check out their surprising confessions in the video below!