From which famous Kate did Ian McKellen turn down a marriage proposal?

A famous Kate apparently made a pretty big offer to Sir Ian McKellen – but he let her down.

The Lord of the Rings star says he was propositioned by Kate Beckinsale.

Kate Beckinsale arrives at the 2015 Metropolitan Museum of Art's Costume Institute Gala benefit in honor of the museums latest exhibit China: Through the Looking Glass May 4, 2015 in New York. AFP PHOTO / TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

He said he was flattered by the proposal, but that he know she knew he was gay, and that she was not serious.

“She is the second actress to propose marriage to me,” he told the Mail.

“She knew I was gay, so she knew she was safe.”

The pair worked together in 1995 on a television adaptation of Cold Comfort Farm, based on the Stella Gibbons novel.

McKellen did not say who the first actress was who proposed to him.

Sir Ian recently warned that Northern Ireland should not “be the victims” of misleading arguments against same-sex marriage.

Same-sex marriage is law in England, Wales and Scotland and the Republic of Ireland – but in Northern Ireland, the Democratic Unionist Party has blocked it repeatedly.