Rachel McAdams recalled going braless to film her new movie “Are You There God? It’s Me, Margaret” shortly after giving birth.

McAdams stars as Margaret’s mother, Barb, in the upcoming flick.

Filming took place just five months after the Canadian actress gave birth to her daughter, with her having to pump in between shots.

McAdams told Bustle in a new interview, “I felt like a milking machine.”

Read More: Rachel McAdams Reveals The Movies She Turned Down During Her 2-Year Break In The ’00s

The costume designer then asked her, “Why don’t we just try this without a bra?”

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A synopsis for the film reads, “Raised by a Christian mother and a Jewish father, an adolescent girl starts to ask questions about religion and faith.”

McAdams continued, “The great irony is Margaret just can’t wait to get into a bra.