Charlie Chaplin gave one of his first professional performances at the Royal County Theatre 1903 [full inscription unknown]

See also...
Nick Harrison on Flickr
Charlie Chaplin
Spudgun67 on Wikimedia Commons
Spudgun67 on Wikimedia Commons
Simon Harriyott on Flickr
Elliott Brown on Flickr
Charlie Chaplin
Spudgun67 on Wikimedia Commons
Open Plaques on Flickr
Spudgun67 on Wikimedia Commons