Shannen Doherty is back at work and looking better than ever!
The 46-year-old actress posted a selfie to Instagram on Tuesday, wearing a long, brunette wig for her new role in the upcoming Heathers TV series. Doherty also shared how grateful she was to be back on set after her battle with cancer.
WATCH: Shannen Doherty Shares Emotional Flashback Video From When She Shaved Her Head
"It's been a rough two years. Fighting cancer. As an actor, people bench you. They assume you're to weak, not able etc etc. and yet it's something like work that invigorates and renews strength to conquer the unimaginable beast," she wrote. "I compared myself to a car today. That vintage Shelby that's been in the garage too long. It's still a great car. The best. Just needs time for the engine to warm up and it's good to go. Performing like it's supposed to."
Doherty continued: "I'm grateful for today. Grateful for everyday. Thank you @heathers for letting me play and be someone else today. Great crew, great writers, great cast, great show, great director. #paramountnetwork2018"
WATCH: Shannen Doherty Shows Off Growing Locks While Vacationing With Husband in Mexico -- 'Curly Hair, Don't Care'
This is the second hairstyle the former Beverly Hills, 90210 star has sported this week. On Monday, she posted a pic of her new haircut, noting that her trademark brunette locks are growing back after she shaved her head for chemotherapy last summer. "After two years of either bald or a crew cut, it's nice to feel a bit more like a woman again," she wrote.
In an exclusive interview with ET in July 2016, Doherty opened up about battling breast cancer and taking life day by day. "I don't look past today," she noted. "I want to believe that if I fight, I'm gonna be OK."
WATCH: Shannen Doherty Gets Nostalgic With Throwback 90210 Photos of Jason Priestley and Luke Perry
Check out more of ET's exclusive interview: