Canadian co-produced period dramas are doing gang-busters as US cable dramas.

Muse Entertainment’s The Kennedys (pictured) drew a record 1.9 million viewers for ReelzChannel Sunday night for the opening of the Kennedy family saga originally scrapped by the History channel.

“Viewers across America showed their ongoing fascination with the Kennedy family and, specifically, their desire to see such a star-studded cast in the highly-anticipated The Kennedys,” ReelzChannel CEO Stan E. Hubbard, said in a statement Monday.

Showtime’s debut of The Borgias, co-produced by Take 5 Productions, drew 1.06 million viewers, representing the US pay cable channel’s biggest premiere audience for a drama in seven years.

The US audience for the costume drama that stars Jeremy Irons was nearly double the audience in Canada, where Bravo! drew 575,000 viewers.

The Borgias‘ debut was up 22% from the premiere of Showtime’s first big period drama, The Tudors, which The Borgias succeeded.

And yet another costume drama co-produced by Take 5 Productions, Camelot, a Canadian-Irish co-production, pulled in 1.125 million eyeballs for its Friday night two-hour debut on Starz stateside.