Knocked Up was only released on May 1, 2007.
 Apatow had stated that it would not be a sequel or prequel to Knocked Up, but a spin-off, focusing on Pete and Debbie, the couple played by Rudd and Mann
In July 2009, while promoting their film Funny People Apatow and Rogen appeared on The Howard Stern Show and defended the work in Knocked Up, disagreeing with the position Heigl had stated

