Many have been curious about Arthur and Lee's child in Joker 2. Joker: Folie à Deux is the sequel to the critically and commercially successful 2019 feature film Joker. The original film established who Arthur Fleck (Joaquin Phoenix) is, his Joker persona, the mental health issues he struggles with, and his rise as a near-mythical figure to various segments of Gotham City's population. The sequel gives Arthur a love interest in Lady Gaga's Harleen "Lee" Quinzel (this universe's Harley Quinn) as he stands trial for the various murders he has committed. At one point during the film, Lee claims that she is pregnant with Arthur's child.

Here's everything you need to know about the child Lee says he's having with Arthur.

In Joker: Folie à Deux, Lee visits Arthur in solitary confinement and they have an awkward sexual encounter. It’s dreamlike, but it does happen. Arthur later learns that Lee has been telling him lies about her family and where she grew up. When he confronts her, Lee makes the claim about her pregnancy. Arthur is understandably shocked and the conversation shifts to a future where they are together.

Towards the end of the film, Arthur escapes from the courthouse after a car bomb explodes outside, and his path leads him back to the staircase seen in the first film. Lee is there, as he had hoped. But instead of running away with him, she says goodbye. When a confused and broken Arthur tries to remind her of the child they are supposedly having, Lee sings the second and third verses of "That's Entertainment," a song that appears in The Band Wagon (1953), a film the couple had previously watched together.