Camille Grammer is not letting her ex-husband Kelsey Grammer off the hook for what she says was a hurtful oversight: forgetting their daughter's 25th birthday.

The former "Real Housewives of Beverly Hills" star took to Instagram on October 26 — two days after Mason Olivia Grammer turned 25 on October 24 — to call out the "Frasier" star, who she says never called or texted their daughter on her milestone birthday. Camille's post included a throwback photo of a young Kelsey holding baby Mason, with a clown emoji placed over his face, according to E! News.

A DAUGHTER SHOULDN'T HAVE TO WONDER WHETHER HER OWN FATHER REMEMBERS HER BIRTHDAY

That was the core message of Camille's post, which argued Mason has felt increasingly shut out of her father's life and home in recent years. Camille also took aim at Kelsey's wife, Kayte Walsh, whom he married in 2011, suggesting she has played a role in the distance between Kelsey and his older children, per Yahoo Entertainment's report on the post.

A Long Co-Parenting History

Camille and Kelsey were married from 1997 to 2011 and share two children, Mason and son Jude, both born via surrogate. The split was one of the more public Hollywood divorces of its era, playing out partly on reality television during Camille's run on "The Real Housewives of Beverly Hills." Kelsey went on to marry flight attendant Kayte Walsh later in 2011, and the couple has since had four children together, making Mason and Jude the oldest of his now eight kids.

Mason, who graduated from Emerson College in Boston in 2024, has continued to model and has occasionally spoken publicly about growing up between her famous parents. Camille has posted birthday tributes to both of her children in past years, including a 2023 message calling Mason "my lovely daughter."

As of publication, Kelsey Grammer had not publicly responded to his ex-wife's post. The Grammer family's co-parenting dynamics have spilled into public view before, and Camille's latest post suggests the tension over Kelsey's involvement with his older children is not new — whether it prompts any private reconciliation, or another round of public sparring, remains to be seen.