There are lots of films where single men act as surrogate fathers, from the John Wayne flick 3 Godfathers to Annie, Curly Sue, Fred Claus, About a Boy, Role Models, Happythankyoumoreplease [yep], Kindergarten Cop, Big Daddy, and (kinda) True Grit. It's also a common trope on TV, in shows where the non-dad "dad" is related to the children in question, like Hangin' With Mr. Cooper, Party of Five, Full House, or Gilmore Girls, and also where a lone man rescues a needy stranger (and himself in the process), as in Punky Brewster.
In the 2005 Disney movie The Pacifier, Vin Diesel plays Shane Wolfe, a Navy Seal–turned–temporary child minder. After failing to protect a government scientist working on a top-secret program that prevents other countries from deploying nuclear weapons, he's sent to protect the man's family as they've experienced some attempted break-ins, presumably in search of the secret program (which Wolfe needs to find before they do). After the scientist's widow leaves for Switzerland to open a newly discovered safety-deposit box belonging to her husband and the hopelessly negligent nanny quits, Wolfe is left in sole control of five children aged from baby to teenager. Hijinks ensue.
In this era of social conservatism, the so-called mommy wars, and renewed cultural clashes about gender, work, and “family values,” it’s hardly surprising that nanny narratives are making a comeback. Faster than you can say “supercalifragilisticexpialidocious,” nannies have popped up in movies (Uptown Girls) and bestselling novels (The Nanny Diaries, I Don’t Know How She Does It), as characters on tv shows (Friends, Kevin Hill, Desperate Housewives), and even as a subgenre of reality tv (Nanny 911, Supernanny).