Keri Russell stuns on The Tonight Show after making a surprise confession about her love life with Matthew Rhys

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

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

Her long, voluminous brunette waves cascaded over her shoulders, perfectly framing her radiant smile. However, her children think otherwise: “My children think there's nothing cool about me,” she complained to Jimmy. Keri is the mother of three children, including one with her long-term partner Matthew Rhys.

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

Reflecting on their nearly decade-long relationship, Keri admitted she barely remembers life before Matthew. “I've been with Matthew for so long that 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 turned into a real-life romance.

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

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Keri also spoke about her current role in The Diplomat, where she plays alongside Rufus Sewell as an embattled couple navigating the turbulent waters of political life. Keri drew parallels between her on-screen and real-life relationships and reflected on the complexities of long-term love.

“This season feels kind of heartbreaking,” she admitted. “I mean, it was such a fun and sexy time. So funny, oh my God!” The raw honesty in her reflections showed a side of Keri that fans don't often see – open, introspective and humorous.

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Keri's romance with Matthew was often the subject of intrigue and admiration. The two first met in 2002, long before the spark ignited, at a friend's party, where a slightly tipsy Matthew asked for her number.

Nothing bloomed then, but fate had other plans. In 2012, the stars reunited while filming The Americans and soon rumors began circulating about their off-screen romance. In 2014, the couple's undeniable chemistry was evident during a GQ photo shoot, which only fueled speculation further. They were soon seen looking cozy at a New York play, 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 has two children, Willa and River, with her ex-husband Shane Deary.

Although she and Matthew have been together for years, they haven't made any official plans for a wedding yet, which Keri seems perfectly happy with. “It feels very adult and like the reality of knowing someone for so long,” she shared, hinting at the deep connection between them.

Keri's journey from her role as Felicity on the iconic '90s series to her acclaimed performances on The Americans and The Diplomat has been extraordinary, and her relationship with Matthew seems to reflect the same depth and development.