The series, loosely based on Stephen King novella The Colorado Kid, was renewed for 13 more episodes last October.
Antoine will appear in the new run as former con-artist Evidence 'Evi' Ryan, who shares a romantic past with Duke (Eric Balfour).
The actress previously played Judith Winter in Being Erica and has also appeared in episodes of The Unit and Soul Food.
It was previously reported that former Beverly Hills, 90210 star Jason Priestley will appear in four episodes of Haven's new season, playing a character named Chris Weekly.
The show's second season will begin filming in Nova Scotia tomorrow and is expected to premiere on Syfy in the summer.
> Click here to read our interview with Haven stars Emily Rose and Eric Balfour