Blake Lively virtually unrecognizable on set of spy movie, 'The Rhythm Section'

/ Source: TODAY

Actress Blake Lively is going deep undercover for her new espionage flick — so deep that she's virtually unrecognizable in pictures taken on the set.

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The 30-year-old star was photographed on the Dublin set of "The Rhythm Section" over the weekend, having lopped off her long hair for a shorter, shaggier style. Lively was also sporting baggy sweat-clothes and a sparing application of makeup. And at times, she hid that new hairdo with a turquoise knit cap that definitely wasn't featured at Paris Fashion Week.

Blake Lively is seen on day two of filming for her new movie, "The Rhythm Section."Splash News

It may be a less-than-glamorous look for the Hollywood beauty, but the film adaptation of a Mark Burnell novel may herald a new chapter for Lively.

That look could be all for the benefit of her character, Stephanie Patrick, a woman out for revenge after her family is murdered in a terrorist bombing of their plane, in the upcoming thriller co-starring Jude Law.

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“'The Rhythm Section,' adapted from the book of the same name, could be the start of a potential franchise for Lively to match up against husband Ryan Reynolds' "Deadpool" movies for household bragging rights. Burnell has penned four novels around Patrick.

Blake Lively attends the "Mr Turner" premiere during the 67th Annual Cannes Film Festival on May 15, 2014 in Cannes, France.Getty Images

The upcoming film boasts a strong female presence behind the camera, too. Director Reed Morano is fresh off an Emmy win for Hulu's critically acclaimed "The Handmaid's Tale."