Teri Hatcher is defying age.
While hanging out on the Rottnest Island in Western Australia, the actress donned a bikini and showed off her incredibly fit body on Instagram.

Donning a red bikini, the 52-year-old Teri smiles for the camera as she lays down on the sandy beach, with the water crashing behind her.
"Wanted to share some of the #rottnestisland experiences I had with a bike from #pedalandflipper and a ride from @corsaireaviation," she captioned the image. "Thanks so much to both! It was the best way to get to and around this paradise. #bikelife #helicopter #goodtimes @rickywhittle #wedontneedarunway."
A fitness marvel, Teri said she even went on a five-mile run during her vacation in Perth and stubbled across a few kangaroos.
"Well this doesn't happen in Los Angeles…," she captioned a photo. "Moments like this make it easy to run 5 miles."
Earlier in the week, Teri appeared to be having the time of her life hanging out with a quokka, a small marsupial found in the area.
"Enjoy this my friends," she captioned a series of images of her and the animal. "I can not stop giggling. No joke…it's impossible to not just keep smiling!! #quokka #mania #cutestanimalever #quokkaselfie #rottnestisland #grateful #sharethejoy."
Teri's fun in the sun came after she reunited with her old "Lois & Clark: The New Adventures of Superman" co-star in Sydney on June 20.
Teri shared a photo of the moment from atop the Sydney Harbour Bridge.
"Soaring together again. So fun to reunite. Thanks to #bridgeclimbsydney. #loisandclark #deancain," she wrote.