Olivia Cooke says it's 'hysterical' that she's 30 and playing a grandmother in 'House of the Dragon'

• Olivia Cooke spoke to The Times about the age gap between characters on HBO's "House of the Dragon."
• Cooke, 30, plays Alicent Hightower. Her on-screen children are played by actors in their late 20s.
• "The years between being a teenager and now a grandma on screen were so short for me," she said.

Olivia Cooke has shared her thoughts about playing a grandmother in "House of the Dragon," despite being 30 years old.