Is That a Starbucks Cup on 'Game of Thrones'?

It isn't the only gaffe to occur on TV or in film.

Some eagle-eyed viewers caught what appears to be a Starbucks cup on Sunday’s episode of “Game of Thrones.” 

Twitter was outraged, with many wondering how this could happen. 

Even Starbucks clapped back, writing, “TBH we’re surprised she didn’t order a Dragon Drink.”

But "Game of Thrones" got in on the joke and responded to the hoopla on Twitter.

No matter how many eyes are in the studio or among production crews working on big films, sometimes mistakes happen.

A water bottle once made a cameo in one of "Downton Abbey"'s production photos. When the show realized what happened, the cast jokingly took a photo together all holding water bottles while making funny faces. 

One of the best-known gaffes is in “The Wizard of Oz," where many always questioned what was in a tree in the scene where Dorothy sings she is “off to see the Wizard.” Some thought a member of the cast or crew had hanged himself. Turns out, it's reportedly a giant bird.

During one intense scene of “Jurassic Park," a hand can be seen reaching out to touch the back of a velocirapter. Ouch.

And Johnny Depp somehow didn't catch the trespasser on board in “Pirates of the Caribbean: Curse of the Black Pearl.” As Jack Sparrow finally returns to captain the Black Pearl, a cowboy wearing a white T-shirt and aviator shades is seen over his left shoulder. 

Watch the video above for more.