Kelsey Grammer, 70, is expecting baby number eight with pregnant wife Kayte Walsh

Kelsey Grammer – one of the highest paid TV stars of all time – is reportedly set to welcome another child at the age of 70.

Kelsey Grammer’s brood is getting bigger.

The 70-year-old actor’s wife, Kayte Walsh, is pregnant with their fourth baby together, Grammer’s eighth.

“Kelsey is thrilled to finally have time to fully enjoy being a father all over again,” a source told Daily Mail Tuesday.

“He’s been incredibly supportive of Kayte throughout this pregnancy, which, though unexpected, has reignited a spark in their marriage that they both needed.”

The source continued, “After giving Frasier one last go, he has hung his hat up on that character and is ready for the next phase of his life. He is looking forward to embracing the hands-on parenting he missed in the past.”

US actor Kelsey Grammer and wife Kayte Walsh are expecting another child. Picture: Robyn BECK / AFP

Photos obtained by the outlet show Walsh, 46, and Grammer out for a stroll in London Tuesday looking happier than ever.

In the photos, Walsh is wearing a flowing navy blue nap dress, which appears to show her growing baby bump.

The pair were joined by their three children Faith, 12, Gabriel, 10, and son James, 8.

A rep for the actor did not immediately return Page Six’s request for comment.

The former flight attendant and Grammer got married in February 2011 in New York City two years after they met on a plane in 2009.

At the time, the TV star was married to Camille Grammer, with whom he shares daughter Mason, 23, and son Jude, 20.

The former couple tied the knot in 1997 and called it quits in 2010.

Their divorce was finalised the following year, with Camille, 56, awarded a $US30 million settlement.

Grammer and his ex-wife Camille.

Grammer married Kayte (pictured) in 2011.

Kelsey, who has admitted to cheating on the Real Housewives of Beverly Hills star, has been married two other times.

The Cheers star first wed Doreen Alderman in 1982, and the exes welcomed daughter Spencer, now 41, before calling it quits in 1990.

Kelsey and Leigh-Anne Csuhany were husband and wife from 1992 to 1993.

Between his first two marriages, the Golden Globe winner became the father of daughter Greer, now 33, with his then-girlfriend Barrie Buckner.

Kelsey told The Guardian in 2018 that he “regretted … earlier in [his] life” being so “busy” with work that his family life “suffered.”

Grammer played Dr. Frasier Crane in the hit show. Picture: CBS via Getty Images

The Emmy winner noted, “Honestly, the beauty of being an older dad is you get a chance to kinda try it again. That’s been a real gift.”

Four years later, he elaborated on his “failings” as a working father to his eldest child, specifically.

Kelsey revealed in a 2022 People interview that he and Spencer had “made amends” and were in a good place of their “hot and cold” relationship.

This story originally appeared on New York Post and was reproduced with permission