Stars including Emily Blunt, Eddie Redmayne and Tom Felton are calling on fans to support a campaign to wipe out seven diseases that affect millions of families worldwide.

The actors have joined forces with End7, a charity initiative aiming to stamp out tropical diseases including ringworm and elephantiasis, and filmed an emotional appeal urging fans to donate to the worthy cause.

In the video, Redmayne, Blunt and Felton watch clips of victims of the gruesome diseases and their reactions are filmed. Blunt and Redmayne struggle to control their emotions while Harry Potter star Felton walks away in distress.

Blunt says, "Until recently, I didn't even know these diseases existed. The serious disabilities and suffering they inflict on the world's poorest people is heart-wrenching. But I was inspired to join the End7 campaign because, for once, the solution is simple and available now. And the cost for treatment is so low that almost anyone can make a big difference by giving just a few cents/pence."