Little Couple’s brave mom DR. JEN ARNOLD Tweeets glad tidings – and yet?

Movie legend John Wayne, the Duke, once announced he was free of cancer — only to succumb inevitably.

But Jen’s announcement couldn’t come at a more appropriate time — World Cancer Day.

Dr. Jen says she’s beating the fight the rare cancer she was diagnosed with last October, Tweeting  “It’s official- ME 1 vs CANCER 0… I WIN! Thank you for all the prayers, thoughts, & support!”

“What a wonderful way to celebrate #WorldCancerDay! I am done with cancer!”

As The ENQUIRER previously reported after a failed pregnancy last Sept., Jen was diagnosed with Stage 3 choriocacinoma, a cancer brought on by the non-viable pregnancy.

“I had my official last chemo treatment,” she told media.

 “And while I’m hesitant to say I’m cancer-free – maybe that’s common for people who have had cancer – I’m doing great. Everything is moving in the right direction. I am very excited.”

DEVELOPING — let's hope NOT.