You're humming it now, aren't you?

The famous theme song from the opening sequence of 'Game of Thrones' has returned for spinoff 'House of the Dragon'.

Last week's first episode of the brand new HBO show was notably without an opening sequence. Instead, we were treated to some exposition in the form of a voiceover and text on screen.

However, this week, episode 2 of 'House of the Dragon' brought back the familiar sound of Ramin Djawadi's cello-led piece. Alongside it came some new graphics.

Following a similar pattern of its predecessor's opening sequence, the 'House of the Dragon' titles flow through what looks like a model city, similar to that of King Viserys' model city in the series itself. Blood rises out of the ground and flows through the streets as the camera pans through them.

"We very much wanted to keep the DNA alive for 'House of the Dragon' from the original show," Djawadi told EW. "We will hear themes that we remember from the original show, but because it's all new characters, this is 200 years before, there is a ton of new material I've written, a lot of new themes that we will hear."

The series is set some 200 years before the events of the original show. Focusing on House Targaryen, 'House of the Dragon' follows the family's time as rulers of Westeros and the complicated politics involved in their line of succession. The disagreements lead to a civil war known as the Dance of the Dragons which plays out throughout the series.

According to the HBO, nearly 10 million people tuned in to the first episode of the series last Sunday. That makes it the most watched first episode of a show in the broadcaster's history.

Last week, HBO confirmed the show is getting a second season, surprising nobody.

Catch new episodes of 'House of the Dragon' every Monday morning on Sky Atlantic and NOW at 2 am.