Dressed in matching black leather bodysuits, the gorgeous pair pouted in the mirror as Alessandra snapped away backstage at a photo shoot.
"Backstage With my girl @doutzen getting ready for the @vanityfair cover shoot with @Jimmyfallon #funn #lovemyjob #bts," she captioned the snap.
She shared another behind-the-scenes photo of the pair walking along a beach with funnyman Jimmy Fallon.
"Behind the scenes for the @vanityfair cover shoot with @Jimmyfallon and @doutzen by #annieleibovitz !! It was freezing walking in our bathing suits by the east river, but what a fun experience!!!" she wrote.
The shoot was to celebrate Jimmy taking over from Jay Leno on NBC's famous Tonight Show.