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Dun dun: Someone call the detectives, because there’s a baby bump investigation underway.

Mariska Hargitay posted on Instagram to show off her Law & Order: SVU co-star Kelli Giddish’s growing belly, because we guess they have a lot of time to burn in their trailers on set.

Giddish, 38, who plays Detective Amanda Rollins on the show, will soon welcome her second child with husband Lawrence Faulborn after announcing the news in September. Her 3-year-old son, Ludo, previously starred in an episode of SVU, according to Us Weekly.

So…another baby actor in the making? This guarantees at least 20 more seasons of Law & Order, right?!

RELATED: Mariska Hargitay Candidly Discusses Work-Life Balance: ‘There Are Days I Go Home & Just Cry’

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