"I've known Tiffany for years man. Years! I'm beyond excited [for her]," Hart said Thursday night's Jimmy Kimmel Live. "I knew Tiffany when Tiffany was homeless. Tiffany was living out of her car and nobody knew. She was trying to keep it a secret."
Hart recalled to host Jimmy Kimmel that he found out his friend was without a home she wouldn't tell him where she lived. That's when he got out his wallet and gave her some money.
"I was nowhere near Kevin Hart today and in my pocket I had $300 and I was like, 'Here. I don't know what your situation is, but hopefully this can do something for you in this time because I feel like you're not telling me something,'" the 38-year-old comedian shared.
Hart said it wasn't until some time had gone by that he was made aware of how much the money meant to Haddish.
"I later found out that the money she took, she went and got like a motel, was able to stay there for like a week, use a proper bathroom. Never told me," he said. "Never told me for years. Other people muttered the rumor. Tiffany got successful, took the story, I found out that [she] wrote in her journal about the relationship with me and her. How I acted as a piece of motivation in stand-up comedy because I simply uplifted her every time we saw her. Told her she was funny. Told her she was going to be a star."
Hart was right! After a breakout year in 2017 -- when she starred in Girls Trip and hosted Saturday Night Live -- Haddish is now acting alongside Hart in Night School, out Sept. 28. Hart, who wrote and produced the film, quipped to Kimmel that he is still waiting for Haddish, 38, to repay that $300.
"Until this day, until this day, she's yet to bring up the money to give it back," he joked. "I don't want to make a big deal about it because look it's one of those things where I'm waiting on her like to say it. When she says it, I'm like, 'Alright, yeah, you should!'"
"I have known Tiffany for quite some time. Very talented comedian, now turning into an actress," Hart said in praise of his friend. "At the success of Girls Trip and seeing how she pops in a film, we felt that adding her to the cast was a magnificent bonus."
Haddish also had nothing but glowing things to say about her co-star and pal. "The truth is that Kevin is one of the most motivational, spiritually inclined people that I know," she gushed. "He teaches me so much about this business and how to conduct myself in such a way, because you know I'm from these streets, so he's teaching me to be street smart, but don't be street up in here. So I'm learning a lot and I'm so grateful he's teaching me how to count money and... and how to get celebrities to come hang out."
Tiffany Haddish out and about
Tiffany Haddish out and about
NEW YORK, NY - MAY 07: Tiffany Haddish attends the Heavenly Bodies: Fashion & The Catholic Imagination Costume Institute Gala at The Metropolitan Museum of Art on May 7, 2018 in New York City. (Photo by Jamie McCarthy/Getty Images)
BEVERLY HILLS, CA - OCTOBER 25: Actress Tiffany Haddish attends the launch of the Samsung Galaxy Note II on October 25, 2012 in Beverly Hills, California. (Photo by Jason LaVeris/FilmMagic)
BEVERLY HILLS, CA - MAY 05: Actress Tiffany Haddish arrives at APCH's 'Girlz in the Hood' Women of Achievement Awards Luncheon at Beverly Hills Hotel on May 5, 2009 in Beverly Hills, California. (Photo by Brian To/FilmMagic)
LOS ANGELES, CA - SEPTEMBER 21: Actress/comedian Tiffany Haddish arrives at Comedy Central's Emmy Awards party at the STK restaurant September 21, 2008 in Los Angeles, California. (Photo by Ethan Miller/Getty Images)
Comedian Tiffany Haddish on stage during Russell Simmons' Def Comedy Jam at the HBO & AEG Live's The Comedy Festival 2007 at Caesars Palace on November 16, 2007 in Las Vegas, Nevada. (Photo by Jeff Kravitz/FilmMagic)
BEVERLY HILLS, CA - MARCH 20: Tiffany Haddish attends the 2017 NBCUniversal Summer Press Day on March 20, 2017 in Beverly Hills, California. (Photo by JB Lacroix/WireImage)
WEST HOLLYWOOD, CA - FEBRUARY 27: Comedian Tiffany Haddish attends Comedy Central's 'The High Court' Premiere Party at HYDE Sunset: Kitchen + Cocktails on February 27, 2017 in West Hollywood, California. (Photo by Jesse Grant/Getty Images for Comedy Central)
LOS ANGELES, CALIFORNIA - FEBRUARY 22: Tiffany Haddish receives an award at the 2nd Annual All Def Movie Awards at Belasco Theatre on February 22, 2017 in Los Angeles, California. (Photo by Greg Doherty/Getty Images)
THE CARMICHAEL SHOW -- 'Intervention' Episode 307 -- Pictured: (l-r) Amber Stevens West as Maxine North, Tiffany Haddish as Nekeisha Williams -- (Photo by: Vivian Zink/NBC/NBCU Photo Bank via Getty Images)
LOS ANGELES, CA - JUNE 25: Regina Hall, Tiffany Haddish, Queen Latifah and Jada Pinkett Smith speak onstage at 2017 BET Awards at Microsoft Theater on June 25, 2017 in Los Angeles, California. (Photo by Frederick M. Brown/Getty Images )
NEW ORLEANS, LA - JULY 01: (L-R) Will Packer, Malcolm D. Lee, Kofi Siriboe, Larenz Tate, Tiffany Haddish, Regina Hall, Jada Pinkett Smith and Queen Latifah pose in the press room at the 2017 ESSENCE Festival presented by Coca-Cola at Ernest N. Morial Convention Center on July 1, 2017 in New Orleans, Louisiana. (Photo by Paras Griffin/Getty Images for 2017 ESSENCE Festival )
NEW ORLEANS, LA - JUNE 30: (L-R) Malcolm D. Lee, Queen Latifah, Tiffany Haddish, Larenz Tate, Regina Hall, Jada Pinkett Smith, Kofi Siriboe, and Will Packer at 'Girls Trip' New Orleans screening at Theatres at Canal Place on June 30, 2017 in New Orleans, Louisiana. (Photo by Paras Griffin/Getty Images)
JIMMY KIMMEL LIVE - 'Jimmy Kimmel Live' airs every weeknight at 11:35 p.m. EST and features a diverse lineup of guests that includes celebrities, athletes, musical acts, comedians and human-interest subjects, along with comedy bits and a house band. The guests for Wednesday, July 19 included Jon Favreau ('Spiderman: Homecoming'), Tiffany Haddish ('Girls Trip') and musical guest The Revivalists. (Randy Holmes/ABC via Getty Images)
LOS ANGELES, CA - JULY 13: Actress Tiffany Haddish attends the premiere of 'Girls Trip' at Regal LA Live Stadium 14 on July 13, 2017 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
NEW YORK, NY - JULY 17: Tiffany Haddish seen at the ABC studio in Manhattan on July 17, 2017 in New York City. (Photo by Robert Kamau/GC Images)
INGLEWOOD, CA - AUGUST 27: Pete Davidson (L) and Tiffany Haddish speak onstage during the 2017 MTV Video Music Awards at The Forum on August 27, 2017 in Inglewood, California. (Photo by Kevin Winter/Getty Images)
NEW YORK - AUGUST 15: The Late Show with Stephen Colbert and guest Tiffany Haddish during Tuesday's August 15, 2017 show. (Photo by Scott Kowalchyk/CBS via Getty Images)
NEW YORK, NY - AUGUST 15: Actress Tiffany Haddish leaves the 'The Late Show With Stephen Colbert' taping at the Ed Sullivan Theater on August 15, 2017 in New York City. (Photo by Ray Tamarra/GC Images)
NEWARK, NJ - AUGUST 05: Tiffany Haddish attends the 2017 Black Girls Rock! on August 5, 2017 in Newark, New Jersey. (Photo by Paul Zimmerman/WireImage)
SATURDAY NIGHT LIVE -- Episode 1730 -- Pictured: Host Tiffany Haddish during the Opening Monologue in Studio 8H on Saturday, November 11, 2017 -- (Photo by: Will Heath/NBC/NBCU Photo Bank via Getty Images)
BEVERLY HILLS, CA - SEPTEMBER 10: Tiffany Haddish arrives for Netflix presents Russell Simmons' 'Def Comedy Jam 25' Special Event at The Beverly Hilton Hotel on September 10, 2017 in Beverly Hills, California. (Photo by Gabriel Olsen/FilmMagic)
INGLEWOOD, CA - AUGUST 27: Tiffany Haddish attends the 2017 MTV Video Music Awards at The Forum on August 27, 2017 in Inglewood, California. (Photo by David Crotty/Patrick McMullan via Getty Images)
BEVERLY HILLS, CA - MARCH 01: Honoree Tiffany Haddish (L) and Presenter Lil Rel Howery speak onstage during the 2018 Essence Black Women In Hollywood Oscars Luncheon at Regent Beverly Wilshire Hotel on March 1, 2018 in Beverly Hills, California. (Photo by Aaron J. Thornton/Getty Images for Essence)
LOS ANGELES, CA - FEBRUARY 28: Tiffany Haddish attends Alfre Woodard and Morgan Stanley present the 9th Annual Oscar's Sistahs Soiree on February 28, 2018 in Los Angeles, California. (Photo by Gabriel Olsen/WireImage,)
HOLLYWOOD, CA - MARCH 04: Actors Tiffany Haddish (L) and Maya Rudolph speak onstage during the 90th Annual Academy Awards at the Dolby Theatre at Hollywood & Highland Center on March 4, 2018 in Hollywood, California. (Photo by Kevin Winter/Getty Images)
BEVERLY HILLS, CA - FEBRUARY 25: Actress/comedian Tiffany Haddish attends the 2018 American Black Film Festival Honors Awards at The Beverly Hilton Hotel on February 25, 2018 in Beverly Hills, California. (Photo by Leon Bennett/Getty Images)
Tiffany Haddish arrives for the 90th Annual Academy Awards on March 4, 2018, in Hollywood, California. / AFP PHOTO / VALERIE MACON (Photo credit should read VALERIE MACON/AFP/Getty Images)
AUSTIN, TX - MARCH 12: Tiffany Haddish attends the 'The Last O.G' Premiere 2018 SXSW Conference and Festivals at Paramount Theatre on March 12, 2018 in Austin, Texas. (Photo by Matt Winkelmeyer/Getty Images for SXSW)
BURBANK, CA - APRIL 29: Tiffany Haddish attends the For Your Consideration Red Carpet Event for TBS' Hipsters and O.G.'s at Steven J. Ross Theatre on the Warner Bros. Lot on April 29, 2018 in Burbank, California. 374251 (Photo by Rachel Murray/Getty Images for TBS)
NEW YORK, NY - MAY 16: Tiffany Haddish attends the Turner Upfront 2018 arrivals on the red carpet at The Theater at Madison Square Garden on May 16, 2018 in New York City. 376263 (Photo by Dimitrios Kambouris/Getty Images for Turner)
NEW YORK, NY - MAY 07: (L-R) Karli Kloss, Brendon Maxwell and Tiffany Haddish attend the Heavenly Bodies: Fashion & The Catholic Imagination Costume Institute Gala at the Metropolitan Museum of Art on May 7, 2018 in New York City. (Photo by George Pimentel/Getty Images)