Los Angeles, Dec 16 (IANS): Actor Neil Patrick Harris has no interest in finding out which of his twin children is his biological offspring.

Harris and his husband David Burtka welcomed twins Gideon and Harper into the world via surrogacy in October 2010, but they don't care which of them has genetic links with which one of their children.

During an appearance on "Barbara's 10 Most Fascinating People Of 2014", he told host Barbara Walters: "We inserted one of my sperm and one of David's sperm into two eggs with the hope that they would both take, just because we both wanted to be dads biologically. And both took, miraculously.

"I have no interest in (finding out). We are their parents and I love them both implicitly."

However, Harris admitted he has "suspicions" as to which of the twins is biologically his and which is Burtka's.

"We certainly have suspicions just based on their behaviour," he said.

The 41-year-old actor came out as gay in 2006 and admitted his parents were initially worried his sexuality "meant bad things".