Captioned "The rebel alliance," the teaser sees Logan Roy, the patriarch of the toxic media mogul family, face up to what could be the biggest threat to his reign yet. 

After some major betrayals in series three, the siblings - or the "new gen Roys" - look to be uniting against their tyrannical father in a bid to take over Waystar Royco. Among them are Kieran Culkin, Jeremy Strong, Alan Ruck, and Sarah Snook as Roman, Kendall, Connor and Shiv.

Alexander Skarsgård will also return as tech visionary Lukas Matsson, as the sale of Waystar to his company GoJo threatens the family's future prospects.

HBO also confirmed Dagmara Domińczyk, Arian Moayed, Juliana Canfield, Annabelle Dexter-Jones, Justin Kirk, Stephen Root, Hope Davis, and Cherry Jones will be returning for the new series.

Watch the teaser below.