Chicago Fire star David Eigenberg has a message for NBC stalwart Law & Order: SVU: Happy 400th episode. The NBC stalwart celebrates the milestone with the episode “Motherly Love” airing at 9/8c Feb. 8.

“If this is what a hundred looks like,” Eigenberg says in the exclusive video above as he points to his face, “I can’t imagine what 400 looks likes.”

No to be outdone by his co-star and fellow jokester, Christian Stolte video bombs, adding, “400? Oh my God.”

“Chicago Fire” celebrated its 100th episode last fall. The show kicked off a Chicago-based franchise from super producer Dick Wolf that now includes four shows. “Chicago Justice” will join “Fire,” “Chicago P.D.” and “Chicago Med” beginning in March.

Wolf also famously launched the “Law & Order” franchise in 1990 that led to spin-offs “L&O: Special Victims Unit,” “L&O: Criminal Intent,” and the short-lived “L&O: LA” and “L&O: Trial by Jury.”

“Law & Order: SVU” is the lone survivor, although work is underway on the first season of another spin-off, “Law & Order: True Crime.”

“SVU” premiered Sept. 20, 1999, and is currently in its 18th season. Mariska Hargitay, who has played Olivia Benson since the show’s debut, directed the 400th episode.

“Motherly Love” centers on a teen boy who shoots an attacker who is assaulting his mother. Afterward, he learns the perpetrator is someone he knows.

Hargitay stars Lt. Benson), Ice T as Det. Odafin Tutuola, Kelli Giddish as Det. Amanda Rollins, Raúl Esparza as ADA Rafael Barba, and Peter Scanavino as Det. Sonny Carisi.

Sarah Wynter, Aaron Sanders, Delaney Williams, Gage Polchlopek, Jason Bowen, Jenna Stern, Benton Greene), Daniel Cosgrove, Chantal Jean-Pierre, Olivia Sargent and Donald Dasg  guest star.

“Law & Order: SVU” airs at 9/8c Wednesdays, on NBC.

Chicago Fire celebrates 100 episodes