Game of Thrones is premiering tonight, July 16, on HBO. The season is going to bring a lot of surprises, including some new cast members that fans are buzzing about. Here are the new people joining the cast that you should keep an eye out for.

Jim Broadbent as an Archmaester

Jim Broadbent is joining the cast as a Maester who meets Sam in Oldtown. He told Screencrush that he’s joining as an archmaester.

I’m a maester, an archmaester. I’m an old professor character.

He has a significant role in five out of seven of the episodes, which he shares with Sam Tarly. This also means that Tarly’s going to have a pretty big role this season too.

Some fans are theorizing that he might be Maester Marwyn from the books, a man who traveled the world studying magic.

Tom Hopper as Dickon Tarly

Billy Bones escaped death, but can he defeat Flint? #BlackSails pic.twitter.com/hWcYvZYQpJ — Black Sails (@BlkSails_STARZ) November 23, 2016

Tom Hopper is joining the cast, but he’s not playing a new character. He’ll be playing Dickon Tarly, who is being recast. He was originally played by Freddie Stroma. Dickon is Sam’s younger brother. Hopper is known for his role on Black Sails.

Megan Parkinson as Alys Karstark

Megan Parkinson será Alys Karstark em Game of Thrones https://t.co/zWlyFg9NUs #GOT pic.twitter.com/Zk2JgUiRMR — Game of Thrones PT (@GoThronesPT) February 27, 2017

Megan Parkinson is joining the cast as Alys Karstark. In the book series, she’s an heir to House Karstark and flees to the Wall, looking for Jon Snow. This doesn’t seem likely to be the plot for Season 7, however.

Eddard Sheeran Has an Unnamed Role

Eddard Sheeran, singer-songwriter, will have some type of role this season. Nothing else is known at this time, but he did confirm this. It will be just a brief appearance with Maisie Williams, who is a huge fan.

Conor McGregor as Euron Greyjoy’s Pirate (Unconfirmed)

UFC champion Conor McGregor is cast in a cameo as a pirate on one of Euron Greyjoy’s ships, according to Screenrant. However, other sources say that he has denied this information. Only time will tell on this one. IMDB does have him listed.

Noah Syndergaard Will be a Lannister Guard

Noah Syndergaard of the New York Mets will have a cameo as a Lannister guard, Sports Illustrated revealed. He traveled to Spain for filming. This will be a minor role since he won’t have any lines.

Bastille May Be Appearing (Unconfirmed)

The Sun is sharing rumors that Bastille might be in the season in some type of guest music capacity. Watchers on the Wall also reported that they were on set in Belfast, but Dan Smith said they were just on a studio tour. At this point, we don’t know if that was the truth or misdirection.

Unnamed Characters Being Added

When casting for new characters in Season 7, the crew of Game of Thrones CinemaBlend reported the following characterswas purposefully vague, not sharing names or too many details. were being added to Season 7:

General

Priest

Warrior

Gate Guard

City Guard

Merchant

Lovely Lady

Young Lord

Lieutenant

Most of the ones listed above were for one week only, so they likely won’t play much of a role. However, the Warrior, Gate Guard, and the Lieutenant will be around for longer than just one episode.

The Warrior is described as a fierce fighter with rough looks, white with an English accent (so not Dothraki.) The Lieutenant was described as Middle Eastern and athletic (possibly a new Dothraki character?) And the Gate Guard is described as a young Northern man who is not afraid to speak his mind.