Law & Order: SVU star Peter Scanavino just welcomed a newborn baby, Leo, on January 8.

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The actor, who plays Dominick Carisi, tweeted a pic of Leo, captioning it: "Welcome to the world Leo."

Meanwhile, Carisi, has also been exhibiting fatherly instincts on the NBC procedural.

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In an interview with The Hollywood Reporter, Law & Order: SVU showrunner Warren Leight dished about the possibility of a full-fledged romance between Amanda Rollins (Kelli Giddish) and Carisi.

In the midseason premiere, Rollins and Carisi shared a quick moment on the show, which seemed to suggest that there was potential for a relationship. Leight's reponse to THR was encouraging.

"Something was going on with Rollins that she had not felt before," Leight said. "Rollins has had one point of view on Carisi for a long time, like the annoying younger brother point of view, and I thought I saw something really interesting in that moment. I'm curious to see where it goes."

In fact, in the scene in the return of season 17, Carisi was essentially seen giving Rollins tips about taking care of her new baby, showing some fatherly instincts. He alluded to the fact that Rollins was definitely getting more comfortable with Carisi.

"The more you get to know Carisi, the more you like him and the more you trust him and I think that's what's happening to Rollins," Leight said.

Additionally the fact that Carisi's family is there for Rollins will also be cherished.

"Her family is not there for her in anyway and his always has been," Leight says. "I imagine Rollins may not have appreciated that as much before as she does now."

The midseason premiere, "Catfishing Teacher," aired on January 6.

Watch a preview:

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