Game of Thrones star Jerome Flynn will be the official starter for the Morrison Great Birmingham 10k next weekend.
The actor, who came to prominence in hit TV shows such as London's Burning and Soldier Soldier, will also be running the race on May 3 in aid of Global White Lion Protection Trust.
He was recruited by Wolverhampton-based fundraiser Ann Fowler who is planning to run 111 miles this year to raise awareness and money for the charity which aims to help endangered white lions in South Africa.
Mr Flynn, who is a patron of the trust, and musician and supporter David Chabeaux are running the Birmingham leg alongside Ann to show their support for the charity.
The 39-year-old is hoping to do 15 runs during 2015 including all the UK events in the Great Run series.
She started her challenge in January with the Great Winter Run and is finishing in October in Portsmouth with the Great South Run.
Individually, she is hoping to raise £2,000 and the charity's overall team has a target of at least £10,000.
After the race, Mr Flynn will be meeting fans in the Rep Theatre from midday.
He said: "Ann's challenge to run 111 miles to raise money to help save the white lions of Africa is truly inspirational.
"The white lions are astonishing creatures - magical, regal and powerful but globally there are only 500 left in captivity and less than ten in the wild.
"If we do not fight to save them, they are likely to become extinct in the next decade, meaning future generations will not be able to enjoy these fabulous animals."
Entries for the Great Birmingham 10k are still open at www.greatrun.org.