“The Assassination of Gianni Versace: American Crime Story” posted FX’s top limited series premiere in the key 18-49 demographic since “Legion.”

The latest installment of the anthology show drew 1.5 million viewers in that age range and 5.5 million overall when it debuted on Jan. 17. Both Nielsen numbers include three days-worth of delayed viewing.

For reference, the Dan Stevens-led sci-fi series pulled in 1.8 million viewers in the key demo when it hit the network last February.

The night of the premiere, “Versace” came in as the No. 1 show on basic cable in both the key demo and total viewers. These ratings put the Ryan Murphy series at No. 4 in ranked cable series premieres in the 18-49 demo since last January and No. 7 among all cable series premieres since 2016 in that group.

The drama centers around the story of legendary fashion designer Gianni Versace’s (Edgar Ramirez) murder at the hands of serial killer Andrew Cunanan (Darren Criss), with both the aftermath and events leading up to the assassination included in the tale. The story plays out in reverse chronological order.

All Nielsen numbers cited are based on three days of delayed viewing.

‘The Assassination of Gianni Versace’ Is FX’s Top Limited Series Premiere Since Legion