Justin Theroux Kisses Liv Tyler's Baby in Cutest Pic Ever!

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Let the Jen and Justin baby rumors begin!

Justin Theroux is really good with babies.

Jennifer Aniston's new husband
met his Leftovers co-star Liv Tyler's son Sailor, and the encounter was so cute that the 38-year-old actress had to share a pic with her 590,000 Instagram followers. In the photo, Theroux is seen kissing the baby's little fingers while a smiling Tyler holds her son.

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"My #theleftovers family meeting my baby boy," Tyler -- who gave birth to her second child on February 11 -- wrote. "I feel so blessed in all parts of my life."

This adorable pic is sure to spark baby rumors for newlyweds Theroux and Aniston, 46.

The two tied the knot this past week in Bel Air, California, just days prior to Theroux's 44th birthday on August 10.

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While Tyler was not confirmed to be at the wedding, the nuptials did boast a star-studded guest list. ET confirmed that Aniston's Friends co-stars Courteney Cox and Lisa Kudrow were at the wedding, as well as Tobey Maguire, Ellen DeGeneres, Portia de Rossi, Jimmy Kimmel, John Krasinski, Emily Blunt, Jason Bateman, Will Arnett, Lake Bell, Billy Crudup and photographer Terry Richardson

Howard Stern was also in attendance and spilled some details about the highly anticipated event during his Monday morning show.

WATCH: Jennifer Aniston and Justin Theroux Jet Off on Honeymoon!

"I love him," Stern said bluntly of Theroux. "I love him and I told Jennifer she deserves a guy like this. Because, after all, she's been very sweet and generous with us, but Justin and his body. His abs, his ass. Look at him. I'm giddy over him!"