The "Hangover" star flashed her new diamond engagement ring for the very first time while out and about in Los Angeles on Thursday.
It's been a week since the news broke that her fiance Bryan Greenberg popped the question while the cute couple was on vacation in Turks and Caicos.
Jamie and Bryan started dating in the spring of 2012, and in mid-April, they took their romance public at the Coachella Valley Music and Arts Festival.
The actress opened about the "How to Make It in America" actor in Elle magazine last year.
"He's kind of suffering with me on my journey training for a half-marathon," the brunette beauty told the mag. "So that's been our thing. He's been running with me. The couple who runs together, stays together! We just stay pretty active."
They're an absolutely adorable couple!
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