After making their red carpet debut as a couple at the 2015 Emmys, Allison Janney and her beau Philip Joncas were still going strong at this weekend's Sundance Film Festival.

Joncas, who is 20 years younger than the 56-year-old actress, happily escorted Janney to the premiere of her movie "Tallulah" at the Eccles Theatre in Park City, Utah.

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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."

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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."