Emilia Clarke Reveals Who Was Responsible for 'Game of Thrones' Coffee Cup

The actress also played "Box of Lies" when she visited 'The Tonight Show' on Wednesday.

Emilia Clarke finally revealed who was responsible for the coffee cup mystery on Game of Thrones when she stopped by The Tonight Show on Wednesday.

Back in May, fans of the HBO show noticed what looked like a Starbucks cup in a scene that took place in the great hall of Winterfell, home of House Stark. In response to "inquiries from those who saw a craft services coffee cup in Sunday night's episode," the network said in a statement, "The latte that appeared in the episode was a mistake. Daenerys had ordered an herbal tea."

The cup was later removed from all platform re-airs.

While many assumed that Clarke was responsible for the cup, she said that it belonged to co-star Conleth Hill.

"We had a party before the Emmys recently, and Conleth, who plays Varys, who's sitting next to me in that scene, he pulls me aside and he's like, 'Emilia, I've got to tell you something. I've got to tell you something, love. The coffee cup is mine,'" she recounted. "It was his! It was Conleth's coffee cup. He said so.

"He's like, 'I think it was. I'm sorry, darling. I didn't want to say anything 'cause it seemed, you know, the heat was very much on you.' And I was like, 'What?'" she recalled. "He was like, 'I didn't have very much to do in that scene.'"

She added that she felt confident that Hill was indeed responsible. "I think that's who did it. "He said it. He might have been drunk, but he said it."

Clarke also joined host Jimmy Fallon in a round of "Box of Lies," a game where each player chooses a box and describes the contents. The other player must guess if they are lying or not.

The actress kicked off the game by opting to lie about the object in her box. While the box contained a corn dog dressed as a vampire, she said that she was looking at "a very small frog wearing a monocle."

After Fallon sniffed out her lie, she admitted that she thought the corn dog was a carrot. "I'm so English. I don't know what a corn dog is," she joked.

For Fallon's first round, the host told Clarke his object was figurines of Donald Trump and "the hero dog that caught the terrorist, and they're doing a Lady and the Tramp — they're about to kiss each other."

Clarke asked Fallon if the figurines were sitting down before she guessed that he was telling the truth. Fallon celebrated his victory after revealing that the real object was a model of a hockey-themed McDonald's meal. "I think that was the first time I ever won!" he said.

Watch the entire segment below.