Are the House of the Dragon cast actually close in real life, or is it all for the cameras? We put Olivia Cooke and her co-stars to the ultimate test in this exclusive House of the Dragon Bestie Test interview.

As we quiz the cast on their behind-the-scenes secrets, Olivia addresses those rumors about a million-dollar Campari deal following her viral "Negroni Sbagliato" moment. The cast members - including Steve Toussaint, Fabien Frankel, Abu Bakr Salim, Bethany Antonia, and Phoebe Campbell - also share lighthearted details from set, from naming their fictional dragons to the truth behind "ice cream day."

Plus, find out which co-star sang Elvis with Danny DeVito on a flight, Olivia's actual favorite Chappell Roan song, and why a Real Housewives or Succession crossover with the Targaryens needs to happen. From One Direction music video cameos to unexpected musical tastes, see how well this fantasy cast really knows each other.

In this video:
00:23 | The Viral Negroni Meme & Those Campari Rumors
01:06 | Guessing the Cast’s Real Drinks of Choice
02:00 | What Would You Name Your Dragon? (Rainbow XOX)
04:24 | Best Days on Set & The "Ice Cream" Mystery
05:45 | Olivia’s Secret 2012 Boy Band Cameo
06:08 | That Time Fabien Sang Elvis with Danny DeVito
08:40 | The Ultimate Crossover: Real Housewives vs. Succession

#HouseOfTheDragon #OliviaCooke #BestieTest #ChappellRoan #HOTD