Lawyer, Accountant, Reserve Ghostbuster
|Played by||Rick Moranis|
"Who does your taxes...?"
- Louis Tully; Ghostbusters
Louis is the quintessential nerd. While a very good-natured guy, he sports a level of social awkwardness that eclipses even Egon's. He tries to be hip and cool, but never pulls it off (he would work out to exercise videos, but at double speed). He tends to be obsessive compulsive when it comes to matters of taxes. More often than not, conversation with him will eventually steer into tax or monetary matters. He's always willing to help out, sometimes with embarrassing results for him, and he'll always point out an opportunity to a friend where they can save money on something. He's also shown to be pretty good with children, a manner he admitted learning from owning a pet hamster.
Deep down, Louis really wants to break out of his humdrum little existence and be a hero. Even though his assault on the slime shell coating the museum was at best negligible, Louis still put his heart into helping out.
Despite his social handicaps, Louis is apparently a top-notch CPA and tax attorney. Peter even held his skills in high enough esteem that he kept Louis on as the team's personal finance specialist.
During the events of the first film, Louis was hosting a party at the time the Terror dogs escaped and began to search for host bodies for Vinz Clortho (The Keymaster) and Zuul (The Gatekeeper). One of the terror dogs found its way into the party and chased down Louis until he was cornered the Tavern on the Green, after which the Terror Dog possessed him.
Louis, now inhabited by Vinz Clortho, runs around Central Park harassing random people in search of Zuul, The Gatekeeper. He bumps into a coachman who gives him a hard time, growling at him as his eyes flared purplish-green. He later was picked up by the cops, who in turn dropped him off at the Firehouse. Following Mr. Peck's visit and the resulting explosion, Louis escaped, staggering around amidst the chaos in New York City in search of Zuul until finally finding The Gatekeeper in Dana Barrett's blown up apartment. They kiss passionately then head up to the rooftop where they consummate their demonic union, later transforming back into their natural Terror Dog forms. After the Ghostbusters battled Gozer, Louis was released from his possession as the Keymaster and returned to normal.
At some point between 1984 and 1989, Louis finished obtained a law degree at night school and expanded his specialties as a tax attorney. On occasion, he would work on probate. In late 1989, at Peter's insistence, Louis reluctantly becomes the defense counsel for the Ghostbusters. Despite only being versed in Tax law, he won the case due to mitigating circumstances. After the Ghostbusters went back in business, Louis was part of their staff as personal accountant and tax attorney, even going so far as to appear in one of the TV ads. At one point, Louis catches Slimer eating his lunch and both flee in opposite directions screaming.
During the week of New Years Eve, Louis finally struck up the courage to ask her out on a date. Janine was busy with babysitting Oscar but asked him to come along. While babysitting with Janine at Peter's apartment, the two became closer and made out on the couch. Oscar was kidnapped. After Dana left to go to the museum, Louis went to the Parkview Psychiatric Hospital to rescue the Ghostbusters. He returned to the Firehouse and with Janine's help, suited up in one of Egon's Uniforms and then left by foot with a Proton Pack on. Underestimating the weight of the equipment, Louis quickly became tired. He was saved by the timely arrival of a city bus that Slimer had commandeered, patching up their incident earlier. Shortly upon his arrival at the museum, Louis starts blasting the Slime Shell covering it as Vigo became weakened from revelers' singing. Upon the defeat of Vigo, the slime shield dissipated, and the crowd hailed Louis as a hero even though he had little to do with the situation.
Ghostbusters: The Video Game Realistic VersionsEdit
Louis was not at work during the day The Rookie was hired. He had not been feeling well and left work early, leaving a note on his desk informing the others. If the work piling up on his desk is any indication, Louis has been sick for several days, at least.
Louis is also shown in the game to have held onto Egon's coveralls as a memento of his experience in the second movie, as it can be seen hung up behind his desk. He apparently switched the label from Spengler to Tully. Possibly in hopes of one day being called into action again.
Secondary Canon HistoryEdit
He appears seasons 5 and 6 and is portrayed as a wimpy accountant much like the films. He did use the proton pack a few times during his time in the show.
For more information of the animated version of this character go to the animated article.
Legion Mini SeriesEdit
After Gozer's defeat, Louis became rich and famous. He made the covers of magazines like Digipocalypse, set off a geek chic fashion trend, became the spokesperson for Keymaster Cologne, and dated models. However, he still desired Dana and even secretly moved into the unit across from Dana in her new apartment. Louis still indulged in financial planning to a degree, and attempted to get the Ghostbusters into investing in a mutual fund. Six months later, Louis sponsored the Fireman's Ball and was its Guest of Honor. Once Michael Draverhaven was defeated, Louis propositioned Peter in his apartment elevator. He offered $1 million to stay away from Dana just so he could get a chance at her. Peter was shocked. Louis raised his offer to $2 million but Peter turned him down and went to see Dana.
Ghostbusters: The Video Game Stylized VersionsEdit
While at the Natural History Museum, Winston instructed Rookie to take a mental head count for Louis.  After Ivo Shandor was defeated, Peter revealed Louis had been scouting locations for new franchises and offered Rookie a choice of Chicago, Los Angeles, or Cincinnati.
At some point, Janine and Louis broke up. It also appears he no longer works for the Ghostbusters. Louis' law degree later influenced Winston to take up studying law, just in case the Ghostbusters went out of business again.
- 88MPH Studios
- Ghostbusters: The Video Game (Stylized Versions)
- Mentioned by Winston in Museum level and Peter at the end
- IDW Comics
- The role of Louis Tully was originally offered to John Candy, who turned it down, and Rick Moranis accepted it.
- In the Ghostbusters role-playing game, Louis is apparently the head of the business end of "Ghostbusters International" the franchise where roleplayers can sign up for. He is known to send player characters memos regarding the state of the franchise. He also prefers to be called "Lou."
- Louis owns or at least at one point in the past owned a pet hamster, even reading it bedtime stories as practice for taking care of children one day. He tends to re-write fairy tales to include financial and tax matters. This practice appears to have paid off as little Oscar Barrett seemed pretty at ease with Louis.
- When once asked if he lived alone, he replied his mother was his roommate. Until she moved to Florida.
- In a deleted scene and subsequent adaptations of Ghostbusters II, Louis went to his cousin Sherman Tully at Parkview to get the Ghostbusters released. 
- Rick Moranis is retired from acting. This is likely why Tully was written out of the story as sick in Realistic Versions of The Video Game.
- Rick Moranis came around towards the end of production of The Video Game and was okay with being involved with the game. It so happened that his head was modeled and ready to go but there wasn't any manpower left to rig him in animation because everyone was working on finishing the cinematics. 
- There was an idea of putting Louis in a fully body cast
- There was an idea of making the area where the Ghostbusters II No Ghost sign, miniature satellite dish, and Ecto 1-a doors are stored Louis' office and just have Louis stick his hand out and play some recorded lines.
- ↑ Louis Reference in The Video Game Stylized Version
- ↑ February 27, 1989 draft
- ↑ "Crossing the Streams Radio Show Episode 29" 16:29-21:30