Actress Liv Tyler will not be returning in the second season of her drama series, 9-1-1: Lone Star, reportedly due to uncertainty regarding international travel owing to the ongoing pandemic.

Tyler is the original female lead actor of "9-1-1: Lone Star" with a multi-year contract, but she asked producers to let her go after season one, due to safety concerns regarding travel, reports ew.com.

The actress who played Emergency Medical Services Paramedic Captain Michelle Blake, lives in London with her family, and flew back and forth to Los Angeles where "9-1-1: Lone Star" was shot.

"What a thrill it was having a movie star of Liv Tyler's stature to help us launch the first season of '9-1-1: Lone Star'," showrunner Tim Minear said.

"We loved working with Liv and will be forever indebted to her for her haunting, powerful portrayal of Michelle Blake. While we were able to tell a complete chapter in Michelle's story, as with Connie Britton on our mothership, we also feel like there are more stories to be told. The door here will always be open for a return," added Minear.

The original series "9-1-1" faced a similar exit when Britton left after the first season.