Julianne Hough had $100,000 worth of jewellery stolen from her car.

The 'Safe Haven' star has been left distraught after three pieces of expensive jewellery - including a $50,000 watch - given to her by boyfriend Ryan Seacrest was taken from her parked Mercedes in a Los Angeles parking lot last Friday night (08.03.13).

According to TMZ, the actress-and-dancer left the pricey valuables in her car as she visited a friend's apartment in Hollywood, but upon returning she discovered the vehicle's door was wide open and the inside had been ransacked.

Julianne, 24, contacted the local police department who reportedly found no signs of forced entry. It is not known whether the actress accidentally left the car unlocked.

The blonde beauty has been dating the 'American Idol' host since April 2010 and Ryan, 38, recently indicated he wants to marry his long-term girlfriend.

Quizzed on Chelsea Handler's talk show, 'Chelsea Lately', if he wants to tie the knot and have a baby, he previously said: ''We both do. She's so beautiful ... stunning. She's the best part of every day.''

Meanwhile, the loved-up actress admitted that her TV star boyfriend makes her ''giddy''.

Recalling him presenting the Grammy Awards pre-show last month, she said: ''I flew in from Nashville - I was at my sister's baby shower - and I walked in right as he was on and he looked so hot. He looked so cute! I got all giddy because it was super exciting to see my man on TV. I was so proud of him.''