Charles Spencer wasnt looking for love when he met his much-younger girlfriend Dr. Catrine Jarman  but that didnt stop him from finding it.

The younger brother of the late Princess Diana detailed his romance with Jarman during a new interview with the Daily Mail, explaining that the two went from friends to colleagues to partners.

[We have] shared interests, he explained. We were fascinated by the same things. And she made me laugh. Laughter was key.

The 60-year-old met the archeologist  who is 18 years his junior  in 2021 when she arrived at Althorp, his familys country estate, to do some digging.

Although he was married at the time, that didnt stop the pair from forming a strong friendship. Eventually, they launched a podcast together called The Rabbit Hole Detectives alongside Reverend Richard Coles.

Despite their bond, the aristocrat insisted there was nothing romantic going on during the early stages of their friendship  especially since he was married to wife Karen Spencer at the time.

The thing is, I am 18 years older than Cat and so there wasnt even the possibility, he said. Ive never been with a much younger person. I wasnt even thinking romance. I was at the tail end of a marriage. It just wasnt a possibility.

He continued, Ive never tried to do a hard sell on Cat. Shes very canny, very emotionally mature. With her I dont pretend to be anything I am not. She knows exactly who I am and who I am not.

The historian revealed he often sent Jarman drafts from his deeply personal memoir, A Very Private School, which helped her understand what had made him the way he is.

I feel that Ive got to know Charles very gradually, as a friend, and I know how his life has developed, Jarman told the outlet. I know who he is now. That is all that matters.

Charles said he is too old for hearts and flowers but that the best way to describe it is that with Jarman, I can be myself.

He added, She knows who I am. Who I really am. I dont have to pretend to be something I am not. And she brings out the best in me.

The pair admitted that their relationship tipped into something else around March 2024  three months before Charles announced his divorce from Karen.

Its unclear exactly when he and Karen split but they reportedly announced their decision to the staff at Althorp  where his sister, the late princess, is buried  in April.

The pair declined to comment on how things came to be, claiming the situation was too complicated.

Charles has seven children from three marriages, including a 12-year-old daughter with Karen. Meanwhile, Jarman has two teenage boys with her estranged husband.

While they didnt discuss their children, Charles told the Daily Mail its nice to find someone who is dynamic and interested.

Put it this way, this is a very easy relationship to be in, he said. Sometimes in the past I was trying to make people better, or make people happier. I think I was a people pleaser. Im much less concerned with that.

The 9th Earl Spencer said several of his close friends have voiced how happy they are that [he is] with someone like Cat because it shows enormous progress from where [he] was before.

Look, its good to be with someone who is just so . . . nice, he continued. I dont want to denigrate anyone, but Cat is just completely different to anyone Ive ever been with before.