Jennifer Love Hewitt, 47, doesn't look like this anymore as she shows off bold new transformation

Jennifer Love Hewitt surprised fans with a bold new look on Monday. 

The I Know What You Did Last Summer star, 47, ditched her dark tresses for a light blonde look as she showed off the transformation in a new Instagram video.

She underwent the dramatic hair change for the upcoming 10th season of 9-1-1, where stars as dispatcher Maddie.

'Season 10 hair ready! Let's go!' she wrote in the caption.

The actress previously rocked fiery red hair on the hit series, but will be switching up her look for the latest season. 

Her fans were thrilled with the stunning blonde look, with one writing, 'So beautiful!' 

'You can literally pull off every color,' someone else gushed. 

'Oh gurl I love a blonde. And this is eating,' another added. 

'Season 10 Maddie walking in like she's about to solve three cases and emotionally wreck us in one episode,' someone else quipped. 

Hewitt credited her new look to Nine Zero One salon hairstylists Nikki Lee and Taryn Houston.

The actress joined the series - created by Ryan Murphy, Brad Falchuk and Tim Minear - in season two.

The hit show explores the lives of Los Angeles first responders - including firefighters, police officers, and paramedics - as they risk it all to save lives. 

Aside from Hewitt it currently stars Angela Bassett, Oliver Stark, Ryan Guzman, Aisha Hinds, Kenneth Choi, Corinne Massiah and more. 

Season 10 of the procedural drama is set to return in the fall.