It was love at first carpool-harmonizing forZooey DeschanelandJonathan Scott!
“They were doingCarpool Karaokeand they had a really fun day,” the source said at the time. “They became friends after and then started talking as friends and realized there was more to it.”
On Thursday, Jonathan teased the release of the episode with anInstagram snap of the foursomehe captioned, “Soon you’ll get a peek into one of the most fun days I’ve ever had! ?”
When the group finished filming in August, hecaptionedphotos with his soon-to-be girlfriend saying, “Met some new humans today. We had fun. I think I’ll keep them.”
“He has a great sense of humor. They have a lot of the same interests,” the source said. “They both love music and movies.”
Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories
Jon Kopaloff/Getty
Last month, Jonathanopened up to PEOPLEabout the fateful day he fastened his seatbelt to sing along with his now girlfriend.
“We were shootingCarpool Karaokeand there was chemistry right away,” he said. “We literally make each other laugh nonstop. I have never been in a relationship where my partner is as romantic as, if not more romantic than, I am. I’m usually the one who carries the romantic load.”
He added: “She’s smarter than me, she’s funnier than me, and she’s cuter than me! She’s a very considerate person, and that’s what I’m looking for. I had said before that the most important thing for me was a sense of humor. But you have to be kind, and she definitely is.”
source: people.com
