Star Wars actor Ben Mendelsohn and Cobie Smulders, who played Robin in How I Met Your Mother, were spotted outside The Piece Hall in Halifax yesterday.
As our video shows, extras in costumes were also seen heading towards the building.
As the Courier reported, there was a lot of excitement Monday when Samuel L Jackson was seen in Halifax.
He walked into Pride and Provenance for lunch and was later seen leaving The Piece Hall.
The historic location was closed for a week and turned into a film set for the filming of the six-part Marvel show, which will screen on Disney Plus.
Other cast members are believed to include Kingsley Ben-Adir, Olivia Colman, Emilia Clarke, Killian Scott, Christopher McDonald and Carmen Ejogo.
There is still a lot of activity around The Piece Hall today, with people transporting camera and filming equipment through the historic building, a huge light placed overhead, and many trucks and other vehicles parked.
Eureka! announced that it would be closed until Friday due to Marvel filming. The crew vehicles are parked in the museum car park.
Marvel is also believed to be turning Dean Clough. Vehicles to be featured on the show were seen parked up and West Yorkshire Fire Brigade have warned there could be theatrical smoke at Old Lane and Dean Clough between 11.30am and 11.30pm tomorrow.
Watch our video and photos as filming began at The Piece Hall yesterday HERE