Kristen Stewart dyes hair orange for new movie 'American Ultra' [Instagram PHOTO], boyfriend Robert Pattinson digs fiery hairdo? Birthday reunion soon

Kristen Stewart recently dyed her signature brunette locks orange!

Not red - orange.

Check out the photo posted on Maison de Cheveux hair salon's official Instagram on April 4:

maisondecheveux: "Kristen Stewart gettin her hair ready for a new role! #americamultra #awesomecolor #houseofhair."

K-Stew made the major hair transformation for her role in the upcoming Indie flick, "American Ultra" (also starring Jesse Eisenberg). An IMDb description of the 2015 film reads:

"A stoner and his girlfriend's sleepy, small-town existence is disrupted when his past comes back to haunt him in the form of a government operation set to wipe him out."

What do fans think of the starlet's fiery new hairdo? Wonder if on-and-off again boyfriend Robert Pattinson digs the new look.

Rumors suggest that Robsten will finally reunite for K-Stew's 24th birthday on April 9th (tomorrow)! Guess we'll just have to wait and see if Stewart gets what she wants for her b-day!