The twins on Rugrats are Phil and Lil DeVille. They are fraternal twins, with Lil being the older by two minutes. They are known for their love of dirt, bugs, and generally getting messy, often engaging in activities like eating bugs or playing in mud.

They generally have the same hairstyle and clothing style, though Lil typically wears overalls and Phil wears a shirt. A key difference is that Phil's earlobes are attached, while Lil's are not.

More Info: en.m.wikipedia.org