As Lily pages through the photo album looking at pictures of her and Carol's glory days, their younger versions are represented by Brittany Snow and Krysten Ritter, stills taken from Valley Girls (2009).
Inspiration for set design, and particularly the look of Blake Lively, was taken from La Dolce Vita (1960) starring Anita Ekberg.
Kristen Bell (Gossip Girl) and William Baldwin (William van der Woodsen), although not appearing in any scenes here, also worked together on Forgetting Sarah Marhsall as Sarah Marshall & Detective Hunter Rush respectively.