‘SAMANTHA Who?” star Christina Applegate will continue to work on her ABC sitcom while undergoing reconstructive surgery.

Applegate, 36, revealed on Tuesday’s “GMA” that she had a double-mastectomy after being diagnosed with cancer in one breast.

She underwent her surgery three weeks ago.

Applegate will be “on a normal shooting schedule” while undergoing her months-long reconstructive surgery, her publicist, Ame van Iden, told The Post yesterday.

“It’s not affecting production,” she said.

Applegate had filmed five episodes for the upcoming season of “Samantha Who?” before the show broke for its summer hiatus at the end of June.

“They’re on a scheduled hiatus and she’ll be back next month,” an ABC spokesman said yesterday.

“It’s business as usual.”