She was a vision in Zac Posen on the red carpet at the SAG awards on Sunday.
And Amanda Seyfried then slipped into a lacy black creation to hit an after party at the Chateau Marmont.
While her first outfit left many dubbing her best dressed, the second failed her at the final hurdle and caused the actress to suffer an embarrassing wardrobe malfunction.
As Amanda piled into a car to head home after a long day, the star exposed a little too much as the sheer nature of the dress revealed her underwear.
It seems the 27-year-old was aware that she may have flashed too much flesh as she quickly swung around in the vehicle so that her bottom was not on show.
The gorgeous blonde’s black frock was adorned with sequins and had several sheer panels across it.
Twice as nice: Amanda wore a Zac Posen gown on the red carpet before switching into her lacy black frock