Knocked Up director Judd Apatow just revealed the age of the baby in the movie and it will end up making you feel incredibly old.
Knocked Up was released in 2007 - almost two decades ago - and a lot has happened in the world since then.
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Donald Trump became US president and recently became the only former POTUS to face criminal charges.
Rihanna rocked the Super Bowl with a pregnant belly, whereas Kim K and Kanye West figured out they are 'not meant for each other' after having four kids. Sigh!
Apart from feeling nostalgic about this belly-tickling movie, the only thing that has massively changed is the adorable baby in the flick.
Knocked Up starred Seth Rogen as Ben, a fun-loving party animal and Katherine Heigl as Alison, a hard-working media personality.
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However, little did the singletons know, their lusty one-night stand will turn into a nightmare when Alison fell eight weeks pregnant.
The movie was a massive hit that focused on the whirlwind journey of the first-time parents.
They welcomed an adorable baby girl at the end of the movie, and Apatow has just offered an update to show how the time has flown.
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Judd posted an epic throwback pic on Instagram addressing how quickly 'time passes by' and captioned it: "That baby is 17."
In the post, a young-looking Jonah Hill and Jason Segel could be seen alongside Seth Rogan and Katherine with the on-screen baby in her arms.
Taking a trip down memory lane, the nostalgia finally kicked in for Instagram users.
One said: "I watched this in the theatre pregnant and single. It felt like it was talking directly to me. My kid will be 16 this year."
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Another one commented: "Damn, I'm old."
A third who couldn't believe it, wrote: "What??? I’ll never blink again. How the heck!?"
One follower jokingly said: "My arthritis just started to act up right as I read the caption."
One user told about the experience of his first date and said: "My now wife and I went to see this movie in the theatre on our first date."
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Knocked Up was arguably one of the funniest movies of the Noughties and grossed $219m at the global box office.
Apatow released This is 40 in 2012, a 'sort-of sequel' that focused on Paul Rudd and Leslie Mann's characters from the original.
Last year, Apatow teased a potential sequel to that movie, telling The Wrap: "I’ve always wanted to make This Is 50 and it is time."
Topics: Celebrity, Film and TV, Seth Rogen