Rebecca Sara "Becki" Newton (born July 4, 1978) is an American actress best known for her roles as Amanda Tanen on the television series Ugly Betty and Quinn on How I Met Your Mother.

Born in New Haven, Connecticut, Becki Newton was raised in Guilford, Connecticut. She is of English and Czech descent and began performing musicals and plays at local theaters, and studied at the University of Pennsylvania, where she graduated with a B.A. in European History. At Penn, Newton was a member of the Alpha Chi Omega sorority.