Roger Dicken, VFX artist who is known for his work on Alien and When Dinosaurs Ruled the Earth, has died. He was 84.

Though Dicken had died on February 18, his death was confirmed recently. He breathed his last at his home in North Wales.

Dicken's friend Mick Cooper confirmed his demise to The Hollywood Reporter.

Dicken was born on April 15, 1939, in Portsmouth, Hampshire in England.

Roger Dicken made his debut in Stanley Kubrick's 2001: A Space Odyssey (1968). He created and operated dinosaur puppets in The Land That Time Forgot (1974) and sculpted dinosaurs and Pterodactylus antiquus (prehistoric flying reptiles) for the stop-motion adventure tale When Dinosaurs Ruled the Earth (1970), written and directed by Val Guest. He was nominated for an Academy Award in the category Best Visual Effects.

Also one of his notable works is the chest-bursting creature in Ridley Scott's Alien (1979).

Roger Dicken also created moth monster for The Blood Beast Terror (1968), bats for Scars of Dracula (1970) and octupuses for Warlords of the Deep (1978). He finished his career with The Hunger (1983).

He is survived by his wife Wendy.