She’s Jill “The Jokester” Biden.

The wife of former Vice President-turned-presidential hopeful Joe Biden can’t resist a good gag — which once led to her cramming herself into the overhead bin on Air Force Two, The Hill reported Wednesday.

“The White House is a serious place, with serious people, doing serious work. If you’re not careful, it can grind you down,” Biden, a college English professor, wrote in her just-released memoir, “Where the Light Enters: Building a Family, Discovering Myself.”

She hatched the idea to pop out of the overhead compartment ahead of a scheduled flight to California during President Barack Obama’s first term.

“I had arrived at Joint Base Andrews early, coming straight from teaching my classes, and was the first one there. As I boarded Air Force Two, I looked around and had an idea,” she said. “The overhead bins were small, but I knew if I scrunched up enough, I could cram myself into one.”

Biden, now 67, climbed on a chair, stepped onto a table and pulled herself up into the bin with help from a naval aide, all while thinking, “Finally, my ballet barre classes were paying off.”

Then she waited.

“When the first person opened the bin to stow his roller bag, I popped halfway out and screamed, ‘Boo!’ — though it was hard to get it out through my laughter,” Biden recounted. “Still, my surprise had the intended effect: this poor soul let out a high-pitched shriek and stumbled backward into his seat, a look of utter shock on his face.”

Biden recalled another time she pulled a romantic prank on her husband — by decorating the windows of his office with cut-out paper hearts on Valentine’s Day in 2009.

“When he walked into the office — accompanied by a senator — later that morning, I wasn’t there to see his reaction, but I know he was both delighted and embarrassed,” she wrote.

Biden is proud to come from a family of April Fool’s Day fans.

“I’ve always believed you’ve got to steal the joyful moments when you can,” she said. “Life is difficult, and if you sit around waiting for fun to show up, you’ll find yourself going without it more often than not.”