Charlie Sheen once gifted a $1 million check to Denise Richards "as a joke" and she cashed it in.

The 60-year-old actor was married to Denise, 54, between 2002 and 2006, and he's recalled an incident when he gave an eye-watering sum of money to his ex-partner as a joke.

During an appearance on the KFC Radio podcast, Charlie shared: "I wrote a check to Denise once for $1 million on her birthday, kind of as a joke, and she kept it not as a joke. And then, like, a month later, f****** cashed it."

Despite this, Charlie doesn't harbour any bitterness towards his ex-wife.

He explained: "You know, if I'm on the other side of that, I'm probably cashing that check."

Charlie just wishes that Denise warned him in advance of her intention to cash the check.

He said: "I guess there's gratitude that there was enough money in that account for that check not to bounce."

Denise previously insisted that she doesn't regret her marriage to Charlie.

The actress separated from the Hollywood star in 2006, when she was six months pregnant with their second daughter - but Denise doesn't regret her decision to get married.

The TV star - who has Sami, 21, and Lola, 20, with Charlie - said: "I don't regret my marriage to Charlie. Because I really do believe that he and I were brought together to have our daughters."

Despite this, Denise decided to separate from Charlie - who struggled with drug and alcohol abuse - because she wouldn't want her daughters to be married to a similar man.

The actress told the Divorced Not Dead podcast: "I said to myself: 'Would I want my daughters to be married to this man?' No offence to him but it's true."

Denise has maintained legal custody of their daughters, but she's also been keen for her kids to have a relationship with Charlie.

She said: "There is a lot that the public doesn't know, and you never know what goes on behind closed doors.

"The times where he was in a good space and able to, I wanted the girls to get to know their dad for him and not what he struggles with. I wanted them to know their dad for them and not what they may or may not read about him."