Blake Lively & Amanda Seyfried Guest Star on 'Sesame Street' Special!

If you watched the new Sesame Street special that just aired on HBO, you saw some familiar faces guest starring on the episode!

Blake Lively and Amanda Seyfried both appeared in “When You Wish Upon a Pickle,” which marked the launch of Sesame Street on the premium cable channel.

In the special, a mysterious wish machine appears on Sesame Street and the magical pickle inside starts granting wishes. Before long, the gang learns they need to be careful what they wish for – especially when they find out he’ll only grant one wish per customer!

Blake played a delivery person while Amanda appeared as Natalie Neptune.

Watch Sesame Street‘s 49th season each Saturday on HBO!