Seth Rogen and Jimmy Fallon Tell Ridiculous Jokes Written By Children in 'Kid Stand-Up' Sketch on 'Tonight Sho

Getty Images

The 'Neighbors 2' star and the talk show host do their best to make hilariously bad jokes funny.

Seth Rogen and Jimmy Fallon donned their best 1980s lounge jackets to do a very special set of stand-up comedy on the Tonight Show on Thursday.

Standing in front of a traditional comedy club brick wall, Rogen and Fallon delivered jokes written by young children, and the comedic stylings of grade-schoolers proved to be pretty amazing (albeit unintentionally). It was basically the stand-up comedy version of Fallon's awesome "Kid Theater" sketch.

WATCH: Channing Tatum Acts Out Goofy 'Magic Mike' Scenes Written by Kids

"What did one lawyer say to the other lawyer? Answer: We're both lawyers," Rogen said, kicking off his set with a joke written by a 9-year-old named Izzy.

Fallon started his bit with a joke, submitted by a 10-year-old named Erin: "You guys hear about the two antennae's that got married? It was a nice ceremony but the reception was amazing."

While a lot of the jokes were basically the kind you'd read off a popsicle stick, or heavily influenced by the parents of the kids who submitted them, the way Rogen and Fallon dove into their washed-up open-mic comic personas made the whole thing come together hilariously.

WATCH: Zac Efron Shows Off His Flawless Seth Rogen Impression on 'Tonight Show'

While sitting down with Fallon before the sketch to promote his upcoming comedy Neighbors 2: Sorority Rising, as well as his new AMC series, Preacher, Rogen took a trip down memory lane with a look at some of his own youthful stand-up comedy.

Fallon played a clip of Rogen, who appeared to be in his teens, delivering a hilarious bit about having to recite the alphabet song while looking up names in a phone book.

"That dates the bit," Rogen joked after the clip. "The fact that I was dealing with an analog phone book at that time, it anchors the bit in a really dated time."

Neighbors 2: Sorority Rising hits theaters Friday, while Preacher premieres May 22 at 10 p.m. on AMC.

WATCH: 'Neighbors 2' Trailer Is Hilarious With the Return of Zac Efron (Who Still Can't Find His Shirt)