Timothée Chalamet among Hollywood stars and charity heroes stepping up for BBC Children In Need

This year's BBC Children In Need show is taking place on Friday, with highlights including Timothee Chalamet pranking Rylan Clark, and a "challenge squad" of young people completing feats in the name of charity. Oscar-nominated actor Chalamet and co-stars Zendaya, Jason Momoa and Anya Taylor-Joy will be seen making Rylan sweat during an interview for their new film Dune: Part Three, with the help of three children, hidden behind the scenes.

The show will also feature Radio 2 presenter Owain Wyn Evans, on a 400-mile cycle challenge through Scotland, Northern Ireland, England and Wales. Last year's appeal raised more than £45m to help children and young people across the UK, and this year's TV event will be broadcast from 19:00 GMT.

They will welcome Wyn Evans, who has been the latest Radio 2 DJ to put himself through a gruelling challenge for Children In Need, following in the footsteps of the likes of Sara Cox and Paddy McGuinness. Wyn Evans is being joined on his final leg in Wales on Friday by 22-year-old Harri, who is living with hidden lasting effects of a brain tumour.