In the episode when they play would you rather Hailey says something about marrying George Clooney or having the best sex with Tom Hardy. In a blooper reel Sarah Hyland who plays Hailey replaced Tom Hardy with Joe Manganiello who at the time was dating and later married to Sofia Vergara who played Gloria.
At the bar, Mitch makes a toast to Haley's first drink ever, but in the episode "Hawaii" in Season 1 Episode 23, Haley gets drunk and is throwing up in the bathroom. Claire consoles her and tells that this would happen every time she drinks alcohol.