While there’s no shortage of characters on HBO’s “Game of Thrones,” the series also excels at peppering in the occasional celebrity cameo into the world of Westeros.

Whether it’s to sing a song, lighten the mood or just plain die, creators D.B. Weiss and David Benioff have opened the door for many well-known fans of the show to appear briefly on screen. Although some are easy to spot, others would require the help of the three-eyed raven to really notice the first time around.

WHO DIED IN 'GAME OF THRONES' BATTLE OF WINTERFELL? A LIST OF CHARACTERS KILLED IN SEASON 8, EPISODE 3

To help make sure fans have spotted the best ones going into the final episodes of the series, below is a rundown of the top cameos on “Game of Thrones.”

[SPOILER ALERT: The remainder of this article will discuss plot details for “Game of Thrones.”]

Aaron Rodgers

Aaron Rodgers appeared briefly in the penultimate episode of 'Game of Thrones.' (Photo by Michael Hickey/Getty Images)

Fans are split on where Green Bay Packers quarterback Aaron Rodgers appears in Season 8, Episode 5. As Daenerys lays waste to King's Landing, eagle-eyed fans believe they spotted the football player as an archer fighting on behalf of the Lannisters as well as a commoner who gets burned by dragon flame. Fans knew to look out for him after he teased his appearance on the penultimate episode prior to its airing. He even posted a behind-the-scenes shot of himself in full costume to mark the occasion.

Chris Stapleton

Chris Stapleton appeared in an episode of "Game of Thrones" as a member of the army of the undead. (Getty)

The country singer is a big fan of the show and made his debut as a wildling that gets turned into a wight at the big Battle of Winterfell. When Jon Snow looks like he’s about to finally have his one-on-one with the Night King, the villain raises Stapleton and a slew of others to stop him. The country music star’s wife, Morgan Stapleton, even took to Instagram to highlight the moment he can be seen in the episode. The singer himself posted a behind-the-scenes look at his time on the show on Twitter.

Rob McElhenney and Martin Starr

Rob McElhenney and Martin Starr were killed during their cameos on 'Game of Thrones.' (Getty Images)

These two come as a pair given that they were featured in the same scene from the Season 8 premiere. McElhenney, the star and co-creator of “It’s Always Sunny in Philadelphia,” and Starr, the “Silicon Valley” actor, appeared as members of Euron Greyjoy’s crew. Sadly, their story arcs only lasted about as long as it took Theon Greyjoy to shoot arrows into them as he rescued his sister, Yara. McElhenney posted a gruesome shot of his character getting an arrow through the eye on Instagram with the caption, “don’t blink."

'GAME OF THRONES' STAR SOPHIE TURNER'S BATTLE OF WINTERFELL REACTION SAYS IT ALL

Ed Sheeran

Ed Sheeran guest starred on HBO's 'Game of Thrones.' (HBO)

Perhaps the most controversial and blatant cameo in the show’s history, Benioff and Weiss brought singer Ed Sheeran in as a sort of gift to superfan Maisie Williams. In the scene from Season 7, Episode 1, Williams’ Arya Stark encounters a group of soldiers who fight for her family’s rival, the Lannisters. However, after Sheeran’s character serenades her and shares some of the group’s food, she realizes that they’re not all bad. Although his character wouldn’t be killed by Arya, an off-handed line in the Season 8 premiere hints that his fate was grim nonetheless.

Will Champion

Will Champion of Coldplay had a guest cameo during the infamous Red Wedding on 'Game of Thrones.' (Getty Images)

There was a lot going on at the infamous Red Wedding. The bloody encounter is now known as one of the most shocking massacres to ever happen on “Game of Thrones,” or any show for that matter. As “The Rains of Castamere” played and characters were killed off left and right, fans may have missed Coldplay drummer Will Champion laying down the beat in the rafters with the band.

Of Monsters and Men

Members of the band Of Monsters and Men appeared twice in cameos on 'Game of Thrones.' (Photo by FilmMagic/FilmMagic)

CLICK HERE TO GET THE FOX NEWS APP

The “Game of Thrones” creators almost never have a musical moment that doesn’t involve some famous people. In this case, all five members of the band appeared in two different scenes as traveling musicians. Their first cameo was in Season 4, Episode 2 at the wedding between Joffrey Baratheon and Margaery Tyrell. They showed up again in Season 6, Episode 6 scoring the play that Arya Stark watches that satirically depicts the events of Westeros, according to The Wall Street Journal.