Keri Russell made an unforgettable entrance on The Tonight Show Starring Jimmy Fallon, captivating the audience with her effortless beauty and charm.

The 48-year-old actress looked downright gorgeous in a chic, off-the-shoulder black mini dress that highlighted her toned figure, paired with sheer black tights and classic black heels.

Her long, voluminous brunette waves flowed over her shoulders and perfectly framed her radiant smile. Her children, however, think differently: “My kids think there’s nothing cool about me,” she complained to Jimmy. Keri is a mother of three children, one of which she shares with her long-time partner, Matthew Rhys.

Her appearance on the show followed a very personal revelation about Matthew. In a recent interview with People, Keri opened up about her relationship with Matthew in a way few fans had heard before.

Looking back on their nearly decade-long relationship, Keri admitted that she can barely remember life before Matthew. “I’ve been with Matthew for so long, I can’t remember any other relationships,” she joked.

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The two, who share a son named Sam, have been together since working on the critically acclaimed series The Americans, where their on-screen chemistry as married KGB spies quickly translated into a real-life romance.

The actress shared that being with someone who understands the demands of the acting world has been both comforting and challenging. “It can be a really nice shorthand because they know what work means to you,” she explained, acknowledging the unique bond she shares with Matthew, who like her is an actor. “But it can also feel like a lot sometimes.”

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Keri also talked about her current role on The Diplomat, where she stars opposite Rufus Sewell as a contentious couple navigating the tumultuous waters of political life. Drawing parallels between her on-screen and real-life relationships, Keri mused on the complexities of long-term love.

“This season it feels a little heartbreaking,” she admitted. “I mean, it was such a fun, sexy time. So much fun, oh my god!” The raw honesty in her reflections showed a side of Keri that fans don’t often see: candid, introspective and humorous.

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Keri’s romance with Matthew has often been the subject of intrigue and admiration. The two first met in 2002, long before sparks flew, at a friend’s party, where a slightly tipsy Matthew asked for her number.

Nothing flourished then, but fate had other plans. In 2012, the stars reconnected while filming The Americans, and soon rumors of their off-screen romance began to circulate. In 2014, the couple’s undeniable chemistry was on full display during a GQ photo shoot, which only further fueled the speculation. They were soon spotted looking cozy at a play in New York City, confirming what many had suspected: their on-screen heat had turned into real love.

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The couple welcomed their son Sam in 2016, a joyful addition to their blended family. Keri also shares two children, Willa and River, with her ex-husband, Shane Deary.

Although she and Matthew have been together for years, they have no official plans to get married yet, something Keri seems completely comfortable with. “It feels very grown-up and similar to the reality of knowing someone for so long,” she said, referring to the deep bond they share.

Keri’s journey from her role as Felicity in the iconic ’90s series to her critically acclaimed performances in The Americans and The Diplomat has been extraordinary, and her relationship with Matthew seems to reflect that same depth and evolution.