The Scottish actor will reach the landmark age on Friday and he's delighted his schedule has landed him in Britain on the big day, as reported.

"On my birthday itself I am going to have a party in London, which is great because I don't get to spend a lot of time there any more," Butler said.

The '300' star has also planned a partying spree, with celebrations continuing in Scotland, New York and Los Angeles.

"The next day I am going up to Glasgow, where I am having a shared birthday party with my 11-year-old niece. I am going to have a family party there and then, when I make it back to New York, I will do something there. I might even have something in L.A. as well," Butler said.