Luckily, the starlet was surrounded by a cohort of supportive pals when she stepped out to a social affair for the first time since receiving psychiatric treatment a month ago.
She has been filming, putting in a glowing appearance on the set of The Beautiful Life, but this was her first time in the full glare of the cameras at a public event.
Spending the evening chatting with designer Charlotte Ronson, who was launching a new fashion collection, the actress appeared back to her usual self.
Ever the professional, she made sure to strike a rock chick pose to show off her friend's 'Hollywood cool' designs.
Charlotte's DJ sister Sam, Lindsay Lohan's on-off girlfriend, also spent time with the OC beauty at the event.
And while there was no sign of Lindsay on this occasion, another guest would, no doubt, be happy to see Mischa looking so well - former beau Cisco Adler, whom she dated for 18 months.