Kaley Cuoco looking stunning in a sexy red gown as she walked the red carpet at an Alzheimer's Association benefit on Wednesday (March 10) night. The "Big Bang Theory" star also took the stage and performed during the "A Night At Sardi's" charity event, showing off her super-toned revenge body in a one of her stage outfits.

The 30-year-old actress has been keeping fit since the divorce from her husband Ryan Sweeting last September, just 21 months after they tied the knot. She recently spoke out for the first time since the split in an interview on "The Ellen DeGeneres Show" last month and she said she was a "much better place" now than she was in the months following her breakup.

Cuoco seemed to be in top form as she walked the red carpet during the event honoring "A Night At Sardi's" co-founder Peter Grad. She looked stunning in a sparkly red, sleeveless Naeem Khan floor-length gown that showed off her toned arms. The fitted dress featured a deep V-neckline and cutouts on the sides with an exposed back, showing off Cuoco's ripped abs. She kept her accessories to a minimum, only holding a black clutch and styled her short blonde hair in messy, slept-in waves.

She took the stage twice during the event in two separate performances. She dedicated her first routine of "Dance 10, Looks 3" from the musical "A Chorus Line" to Grad and wore black fishnet tights, super short black shorts and a tight red crop top with rhinestone embellishment at the neckline.

Later in the evening, she joined her "Big Bang Theory" castmates and performed the night's finale alongside Jim Parsons, Mayim Bialik, Simon Helberg, Kunal Nayyar, Johnny Galecki and Melissa Rauch. Cuoco changed into a gold swing skirt with pillowed detailing, a black top and a red scarf tied around her neck and sang "You're The One That I Want" and "We Go Together" from the hit musical "Grease" with her castmates.

 "A Night At Sardi's" is an annual musical revue featuring celebrities and an award dinner that benefits care, research and support for the Alzheimer's Association. Last night's benefit was the 24th and last-ever event, and served as a tribute to Grad, who co-founded the event with his wife, Laurie Burrows Grad, 23 years ago.

See Cuoco's outfits from the event below.