The stars of the new Harry Potter TV series are attending their first big event together!

Dominic McLaughlin posed with his arms around co-stars Arabella Staunton and Alastair Stout as they stepped out for the HBO Max Launch Party on Wednesday (March 25) held at Queen Elizabeth Hall in London, England.

For the event, Dominic, 12, sported a denim outfit, Arabella, 11, wore a green jumpsuit, and Alastair, 12, wore a denim jacket with gray jeans.

Keep reading to find out more…In the upcoming series, Dominic will be playing Harry Potter while Arabella will be playing Hermione Granger and Alastair will be playing Ron Weasley.

Earlier that day, HBO Max debuted the first trailer for the first season of the Harry Potter series, which will follow the events of the first book, Harry Potter and the Philosopher’s Stone.

The cast also includes John Lithgow as Dumbledore, Janet McTeer as Professor Minerva McGonagall, Nick Frost as Hagrid and Paapa Essiedu as Professor Severus Snape.

Harry Potter and the Philosopher’s Stone will premiere on Christmas last er this year!

Click through the gallery for more photos of the Harry Potter stars at the event…