Original: Phillip "Phil" Richard Bill and Lillian "Lil" Marie Jill DeVille, or simply Phil and Lil, are the twins from the Nickelodeon shows Rugrats and All Grown Up!
Simplified: Phillip "Phil" DeVille and Lillian "Lil" DeVille are two of the four main characters of the Nickelodeon shows Rugrats and the spin-off All Grown Up!. They are twins.