Emilia Clarke had an unforgettable first day on the “Game of Thrones” set.

In a video for the HBO show’s YouTube channel, the actress who plays Daenerys Targaryen recalled her embarrassment after falling off a horse during her first day filming.

“Yeah, I remember my first day on set,” Clarke said. “Oh my God, I fell off a f—ing horse. Jesus, this was my first job. This is like the first thing I ever did, and they stuck me on a horse in a bamboo field in Belfast, and it’s raining. I was falling off the horse trying to act still.”

Clarke said the incident made her emotional.

"I remember...hanging on for dear life, and I just remember shouting, 'Please stop filming,'" she said. "I turn around and it's like the whole crew, and I just cried."

Read more: Emilia Clarke worried that she would lose her ability to act after 2 life-threatening brain aneurysms, but said filming 'Game of Thrones' helped her cope

Game of Thrones season 8 trailer breakdown 15

Foto: Winterfell was expecting them.sourceHBO

The actress first started playing Daenerys when she was 22. She recently revealed that she suffered two brain aneurysms while filming the series.

In a personal essay in The New Yorker titled "A Battle for My Life," Clarke said the first happened while she was working out with a personal trainer following the first season of "Game of Thrones" in 2011. Her second aneurysm required an operation after the third season.

Read more: Emilia Clarke reveals she underwent brain surgery twice during 'Game of Thrones' and has now founded a charity for rehab access

Now 32-years-old, Clarke said playing Dany has shaped her life.

"The journey I've been on with Daenerys has sharpened me as an actor, and because of the heights that she goes to, it's forced me to find them within myself," she said. "Anytime anything good or bad happens, you put it into her, so Daenerys is a tapestry of my entire adult life."

"Game of Thrones" returns for its eighth and final season Sunday, April 14 at 9 p.m. ET on HBO.

Watch the full video below.