The Walking Dead’s Sonequa Martin-Green is headed to CBS for new Star Trek series. Fans of the AMC show might recognize Martin-Green as Sasha Williams, but it looks she’ll be doing double duty in a lead role on Star Trek: Discovery. Martin-Green will be playing a lieutenant commander; her casting is the first major detail to come about Star Trek: Discovery after months of reports about delays.

While Martin-Green isn’t the first black woman to feature in a Star Trek movie or series, she is the first to star as a lead officer. Star Trek: Discovery will also be the second series to feature a woman as the lead.

News of Martin-Green’s casting naturally sparked speculation about the fate of her Walking Dead character, but Entertainment Weekly reports that she’ll continue on the show as a series regular. Martin-Green first appeared on The Walking Dead, now in it’s 7th season, during season three.