Downton Abbey stars Rose Leslie and Theo James, who appeared in the first series of the beloved period drama, are set to team up in The Time Traveler's Wife.

According to Deadline, the two actors will star alongside one another in HBO's drama series based on the novel by Audrey Niffenegger. The sci-fi romance drama will be adapted by former Dr. Who head writer and Sherlock co-creator Steven Moffat.