Dancing with the Stars celebrated its 200th episode with the return of more than 50 stars from seasons past.
But the 50-year-old actress made a triumphant comeback with a fiery tango.
"Hopefully we are over the hump and I feel invigorated by tonight," Grey said.
Bristol Palin got the lowest scores of the night for a waltz inspired by Kelly Osbourne's dance on Season Nine.
"That's big shoes to fill. She made people cry during her dance. I didn't quite fill them," Palin said.
The newly slimmed down Osbourne was there cheering Palin on.
"In rehearsals today she was a bit off, but she pulled it off amazing during the show," Osbourne said of Palin's waltz.