Stand-up comedian and TV presenter Richard will make his debut during the first live scenes of the soap's 30th anniversary celebrations in February.
Richard, who is best known for his comedy and roles across TV and theatre, said: "I want to thank Dominic [Treadwell-Collins] and Julia [Crampsie] for giving me this amazing opportunity.
"EastEnders is a show I've grown up watching, so to film on Albert Square is something I'll never get used to! To know my first ever scene will be a live one hopefully means the team believe in me and I won't let them down!"
Bosses are keeping tight-lipped over Richard's storyline, or whether he has any connections to Walford's residents, but we're told it's set to be "explosive".
Executive producer, Dominic Treadwell-Collins, added: "Richard Blackwood has always been on our EastEnders wish list – and now the perfect part has come along.
"Richard's an authentic Londoner and a terrific actor, bringing with him warmth, humour and energy which will add so many layers to this 21st century EastEnders villain. The status quo in the Square is about to be well and truly shaken…"
Richard had his own comedy show, The Richard Blackwood Show, from 1999 and 2001 on Channel 4. He also starred as Donkey in the West End musical of Shrek.
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