After rewearing a yellow Ralph Lauren skirt she first wore in 1999

Flockhart wore an archival Zac Posen dress

to the premiere of her husband

and the Dial of Destiny in Germany.

Flockhart's stylist Elizabeth Stewart posted on Instagram,

"Calista is wearing archival #ZacPosen - thank you @zacposen!"

Stewart did not specify what year the Zac Posen gown is from, but in 2019

he announced he was closing his eponymous brand—so it's definitely a few years old (at the very least)