Lisa moves to the treehouse, but Bart starts using a chainsaw to bother her too, so she relocates to the music class at the school, where she finds other kids playing.

Producer James L. Brooks came up with the idea of making a film with Billie Eilish during a conversation with Al Jean.

[6] Paul Bradshaw of NME found agreeable that the short film provides gags centered on Eilish and O'Connell, praised the new record of The Simpsons Theme, and complimented the end credits for its humor.

[7] Mike Celestino of LaughingPlace.com gave a positive review, writing, "On the whole, When Billie Met Lisa makes for a fun diversion that is sure to delight crossover fans of The Simpsons and Eilish, though a few of the jokes do fall flat here and there, and like the other above-mentioned shorts it goes by very quickly.

"[8] John Schwarz of Bubbleblabber gave When Billie Met Lisa an eight out of ten stating "A few solid jokes jab in before the climax make this a delicious morsel of a snack though I do hope that Billie comes back in the future because it seems the gag department had a bunch of early fun with her that I think can be more fully fleshed out across 22-minutes.