Helen Mirren Helen Mirren

Helen Mirren's star turn in Prime Suspect is turning out to be a hard act to follow.

Production on the pilot for a U.S. remake has been pushed back by NBC because of difficulties casting the lead role, according to The Hollywood Reporter.

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The reboot was written by Without a Trace creator Hank Steinberg and based on the popular BBC drama of the same name — which also aired on PBS. The crime procedural followed a detective as she investigated complicated cases.

Following a long search, NBC executives decided to postpone the pilot until June since they felt they had not been able to find the best actress for the part, the trade paper reported.

Mirren, the series' original star, won two Emmys and three BAFTAs for her work as Detective Jane Tennison.