Mariska Hargitay and Christopher Meloni enjoyed a "happy" reunion Thursday ahead of the holidays.

The 53-year-old actress shared a photo with her former "Law & Order: SVU" co-star on Instagram after running into the 56-year-old actor.

"'Tis the season... ran into this #HAPPY man," she captioned the picture.

The snapshot gives a blurry look of a smiling Hargitay and Meloni. The actor posted a clearer picture on his own account.

"Friends #Seehappy #jingleHells," he wrote.

Hargitay and Meloni didn't provide further details about their reunion, although the actor appeared to be celebrating his SyFy show, "Happy!," with his cast mates.

The series stars Meloni as a hitman who can see a little girl's imaginary friend.

"I'm a disgraced detective who now makes his money as a hitman," he said on Wednesday's episode of "Today. "

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"In the middle of a job, I have a heart attack. I wake up and I see this little, blue, flying unicorn in front of my face ... He's been sent to find me so that I can save this little girl."

Hargitay and Meloni co-starred as Detectives Olivia Benson and Elliot Stabler on "Law & Order: SVU."

Meloni left the police procedural in 2011 after 12 seasons, while Hargitay continues to star on the NBC show.