Cowboys, stetsons, bucking broncos and J.R. masks - it could only be the arrival of "Dallas" in London.

Stars Larry Hagman, Linda Gray and Patrick Duffy were at a Southfork Ranch outpost by the River Thames on Tuesday night to launch the rebooted soap with a big Texan party.

The younger generation of actors - Jesse Metcalfe, Josh Henderson, Jordana Brewster and Julie Gonzalo - also was there.

After success in the U.S., the first season of the new "Dallas" TV series will be shown in the U.K. beginning Sept. 5 on Channel 5.

Duffy, who plays Bobby Ewing, says it was British audiences who helped the show become a hit the first time around, when they adopted the night-time soap and made it popular around the world.

He's hoping they'll do the same with the re-launched version.