"Party Crasher" is the 12th episode of the fourth season of the American sitcom Modern Family, and the series' 84th episode overall. It aired January 16, 2013. The episode was written by Danny Zuker & Christopher Lloyd and directed by Fred Savage.

Gloria (Sofia Vergara) and Jay (Ed O'Neill) try to organize a very special day for Manny (Rico Rodriguez) since it is his 14th birthday and as Gloria says, it is the last birthday they are going to be just the three of them. So, they plan a surprise party. While they are out of the house trying to get a cake, the rest of the family is at their home setting up the party. Manny, thinking that no one will be home, comes home with his new girlfriend (Krystal Gauvin) who as a birthday gift, kisses him. The problem is that they do not know that everyone is watching them. The girl feels embarrassed and runs away and Manny locks himself in his room. The day is not over yet as Gloria goes into labor. Now, Manny has to also share his birthday with his new baby brother.

Cam (Eric Stonestreet) feels he has neglected Lily (Aubrey Anderson-Emmons) lately with his commitment to work which Mitchell (Jesse Tyler Ferguson) interprets as his job not going well. In the meantime, Lily has asked Mitchell to marry her and that makes Cam think that Lily does not love him anymore. So, he organizes a second marriage for him and Lily and tries everything to win her back.

Meanwhile, Haley (Sarah Hyland) starts hanging out with a much older guy named Kenny (Jason Mantzoukas), wanting to get a rise out her parents. Claire (Julie Bowen) does not like it at all, while Phil (Ty Burrell) takes a while to realize that they are not just friends. In the process, he takes it extremely worse than Claire, who remembers that when she was at Haley's age she started dating an older guy to get a rise out her dad and she realizes that Haley is doing the same. So, she convinces Phil to ignore it and not say anything because the more they show it bothers them, the longer Haley is going to stay with him.

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