David Tennant has admitted he worried his teenage son would be "rubbish" at acting and was relieved to discover he was "incredibly talented".

The 49-year-old Doctor Who star said he had concerns his 18-year-old son, Ty, who has already starred in Tolkien and TV series War of the Worlds, revealed how he and wife Georgia had discussed what they would do if their child's ability didn't match up to his ambitions.

Speaking to Candid magazine, he said: "Acting is a crapshoot anyway, and Georgia and I had this fear when he went into it of, what if we see him in something and he's rubbish?

"Will we be able to tell him? But as it turns out, he's incredibly talented. Which was a great relief to realise!"

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Tennant went on to praise his "lovely" family, saying that "being a dad is one of the most extraordinary and life-affirming things that can ever happen to you, as well as being something you have to keep working at if you're going to be any good at it."

The actor and his wife also have four younger children named Olive, Wilfred, Doris and Birdie.

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