Kirstie Alley says she's dropped 50lbs -- and yesterday in L.A., we finally got a look at her new figure.

Wearing a loose fitting, white button-down and black pants, Alley showed off her curves (left) -- just one week after posting on her Twitter "I've lost over 50 lbs...and I'm having the time of my of my life...30 more to gooooooooooooooooooooooooooooooooooooooooooooooooooo."
The last time we saw Kirstie out in public was back in March -- where she wore a flowy black dress (right).
Alley, who was once the face of Jenny Craig, has her own weight loss program now called Organic Liaison.