Rugrats Theme Song

Rugrats Theme Song is a theme song written by Mark Mothersbaugh that plays before the beginning of every Rugrats episode. The original version appeared in the original series, while it was remixed twice in both the later episodes of the original series and the revival. The original version lasted up until 2001, when it was then updated with less synth sounds and incorporated more instruments. When Mothersbaugh revealed the series revival to Billboard, he mentioned that “We’re working on the new Rugrats. They’re bringing it back. I worked on the theme song again, updated it a little bit, and my brother is doing the episodes and new songs for that right now,” thus revealing that the new theme was being updated once more.

Intro (Seasons 1 - 6)
A diaper flies mid-air as Tommy's legs go through it. Tommy gets back on his feet as it shows Grandpa Lou sleeping in the arm chair as Chuckie zooms by on a vacuum cleaner. Tommy toddles up to the mirror on the closet door but falls right in front of his bottle. Phil and Lil are seen running the background as Tommy attempts to drink from his bottle. He gasps as a toy robot cat is seen walking towards him. Rolling onto his back and holding his bottle, Tommy watches the toy while Phil and Lil run in from the background and Chuckie can be seen riding around on the vacuum once again. Phil is seen climbing his way on a chair next to the desk as Lil, who was still running, screeches to a halt knocking over the chair Phil climbed and also pulling the phone that was sitting on the desk onto the floor as she had grabbed the phone's cord.

Tommy sprays and knocks the toy robot down with milk, forcing it to short circuit as it cuts over to the closet where Angelica has dressed herself and Spike up. Dragging Spike out of the closet with her as she walks in the direction Tommy's in, unaware of Chuckie behind the corner coming in riding on the vacuum. The nozzle of the vacuum gets caught on the wall as the hose pops off causing Chuckie to go flying with the machine half of the vacuum and leaving Angelica covered in dust. Tommy watches as Chuckie crashes into the waste bin next to the desk and lays on the floor. The front door then opens to reveal Stu and Didi as Tommy crawls over to them. Didi picks up Tommy as it pans to show all the babies on screen, Angelica quickly swipes some dust away from her dress, as Tommy squirts milk onto the screen.

Intro (Season 7-9)
Two diapers fly in mid-air. Tommy's legs go through one pair and the other lands on top of Dil's head. Tommy then goes back on his feet and brings his baby brother into his arms and they both watch a flying airplane with Angelica's doll Cynthia inside. Grandpa Lou is sleeping on the couch and Spike begins to chase the airplane. While doing so, he sets off several bouncy balls with a blue one going towards the bathroom where Chuckie is playing with the toilet paper. He steps on the blue ball, causing him to fall into the toilet and his shoe comes falling off.

The airplane is being remote controlled by Angelica who uses it to dodge a ball and knock down a Reptar doll while flying the plane clear out the open door and into the lawn where Spike continues to chase it and Phil and Lil are seen playing in the garden. They join the others and Kimi is revealed to be hiding in the sandbox with a sand bucket on her head and Susie is also playing with her skipping rope. Didi then brings out a plate of cookies for the kids to enjoy and Angelica then throws her remote control away when she runs to join the others and Spike catches it in his mouth mid-air. Just as Angelica prepares to sit down with the others, Spike shakes his head with the remote in his mouth and causes the airplane to go crashing into her from behind, knocking her into the cookies.

Rugrats (2021 series)
A diaper flies in mid air as Tommy's legs go through it. Tommy gets back on his feet, pulling up the side of his diaper to fix it, then begins to crawl under the couch. Chuckie's feet can be seen as he runs by running away from a vacuum robot. Tommy peeks from under the couch as Grandpa Lou is seen with headphones on and stretching. Susie pops in from the right of the screen, giggling, as she gives a wave of the coast being clear with the paper she has in hand. Chuckie is seen now riding the robot vacuum as it zooms around the room, including under Grandpa Lou before bumping into the side table and off the left side of the screen. Susie runs, following behind him as the closet is opened and items are seen being thrown out.

Tommy crawls out from under the couch and walks toward the closet as he stumbles and falls in front of his bottle. Spike can be seen napping next to him as he falls. Tommy attempts to drink from the bottle as a frog jumps onto Spike's head, waking him up. The frog then jumps in front of Tommy as he looks at it. Phil and Lil peek out from boxes in the closet, with Phil being inside of the box with a hat on his head, as they run out to catch the frog. Grandpa Lou is still stretching unaware of what's happening as Chuckie is zooming around in circles on the robot vacuum while Susie watches and Phil and Lil run to the arm chair to catch the frog, which jumped onto the seat of the chair. The frog hops onto a lunchbox on the shelving next to a charging cellphone, which are all knocked off by Lil as she dives to grab the frog. This also knocks over a lamp in the process. The frog hops away towards the stairs as Phil and Lil continue their chase.

A robot Cat toy can be seen walking down the stairs along with Angelica who's riding in her Cynthia car down the stairs as well. She runs over the robot cat, destroying it, as Phil, who also picked up the frog, and Lil scramble away to not get hit by her toy car. Angelica says "Tada!" as Chuckie holds onto the robot vacuum which then explodes, leaving Angelica covered in dust. Susie giggles as Angelica then glares at her. Susie then whistles innocently as it cuts over to Tommy watching Chuckie spinning out of the control with the robot vacuum and collides into the trash can leaving him lying on the floor. The front door opens to reveal Stu and Didi as they give a look of approval while Tommy crawls over. Didi picks up Tommy as it pans to everyone on screen. Tommy aims his bottle at Didi then Stu before pointing and squirting the milk onto the screen.

Trivia

 * The video of the 2021 revival theme was mistakenly released on the Paramount+ YouTube channel on May 14th, 2021. It was later unlisted shortly after it was uploaded; it was also deleted on May 15th, 2021. The theme song, however, was re-uploaded on May 17th, 2021.
 * There were four episodes from Season 6 in the original series that were held back until Season 7 in the United States. This resulted in these episodes having the newer version of the theme play instead of the original despite Kimi not even being in the group yet.
 * During the 2021 series episode, traditions, the characters are wearing Christmas outfits and the house is decorated for the holiday. Tommy also reaches for a gold ornament instead of his bottle.