Sandler plays a successful comedian who moves the less-successful Seth Rogen into his house to write additional jokes for him. In real life, Apatow once lived wth Sandler and wrote jokes for him and other comedians after realizing he had no future as a stand-up.
One of the Sandler character's posters bears a strong resemblance to this real-life poster for Going Overboard, which starred a pre-fame Sandler and is always inexplicably facing outward on the DVD rack whenever we go to Best Buy.
In Knocked Up, Rogen's character worshipped at the altar or Eric Bana's ass-kicking Jew in Munich and announced, "If any of us get laid tonight, it's because of Eric Bana and Munich." Who, then, would Apatow pick to play Sandler's impossibly perfect romantic rival in Funny People? Bana—ironically, a former comedian Down Under.
Rogen and friends are spotted numerous times in the trailer hiking up and down Runyon Canyon for exercise. Poor guy—even on a big-budget, well-catered film like this one, Rogen has to keep slimming down until he's the size of a toothpick-waisted hipster standing in line for MGMT at the Echoplex.