Bear Grylls happy Running Wild is 'rocking' hit in US

TV explorer Bear Grylls is delighted his celebrity survival series is a hit in the US.

Running Wild, external takes stars out into the wilderness.

Film stars who have joined Grylls for Running Wild include Zac Efron, Ben Stiller and Channing Tatum.

Grylls, who lives part of the year on an island off Abersoch on the Gwynedd coast, said the series was "rocking" as the summer ratings hit on NBC.

He told Chris Dearden it would be shown in the UK in the autumn.

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