Donning a figure-hugging all-green outfit, the Mom star couldn't stop smiling alongside her production coordinator boyfriend.
While things look pretty serious between Janney and Joncas, the former West Wing star has said in the past that she's not too keen on settling down. "I want to be a player!" the Emmy winner, who has never been married, told ELLE in 2014. "I want to feel sexy and pretty and young as long as I can."
Jennifer Lopez and Casper Smart are another celebrity couple with a big age gap between them. In September, they made light of their 18-year age difference by dub smashing a line from Wedding Crashers. Check it out: