Christina Applegate says she's now free of breast cancer following treatment.
"I'm clear," Applegate, 36, tells Good Morning America.
"Absolutely 100% clear and clean...They got everything out so I'm definitely not going to die from breast cancer."
In an interview airing on Tuesday, the star of Samantha Who?, who was diagnosed a month ago, says the cancer was discovered in the second of two MRI tests done as a follow-up to a biopsy performed last year.
"I was so mad and I – I just remember I was – I was just shaking," she says. "And then also immediately, I had to go into...'take-care-of-business-mode,' which was...I asked them, 'What do I do now? What – what is it that I do? I get a doctor, I get a surgeon, I get an oncologist? What do I do?'"