Jennifer Lawrence worried it would be 'uncomfortable' meeting Melissa Rivers on 'Joy' set

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Jennifer Lawrence worried it would be 'uncomfortable' meeting Melissa Rivers on 'Joy' set
NEW YORK, NY - MAY 14: Jennifer Lawrence seen out in Manhattan in a see through top and blazer on May 14, 2016 in New York, NY. (Photo by Josiah Kamau/BuzzFoto via Getty Images)
NEW YORK, NY - MAY 14: Jennifer Lawrence speaks onstage at the 27th Annual GLAAD Media Awards hosted by Ketel One Vodka at the Waldorf-Astoria on May 14, 2016 in New York City. (Photo by Brad Barket/Getty Images for Ketel One)
Girl Meets Boa: #JenniferLawrence, photographed by Patrick Demarchelier for Vanity Fair. Pick up the March 2015 issue for the full Spotlight.
LOS ANGELES, CA - NOVEMBER 17: Actress Jennifer Lawrence arrives at the 'The Hunger Games: Mockingjay - Part 1' - Los Angeles Premiere at Nokia Theatre L.A. Live on November 17, 2014 in Los Angeles, California.(Photo by Jeffrey Mayer/WireImage)
LOS ANGELES, CA - NOVEMBER 17: Actress Jennifer Lawrence arrives at the Los Angeles premiere of 'The Hunger Games: Mockingjay - Part 1' at Nokia Theatre L.A. Live on November 17, 2014 in Los Angeles, California. (Photo by Gregg DeGuire/WireImage)
LOS ANGELES, CA - NOVEMBER 17: Actress Jennifer Lawrence arrives at the Los Angeles premiere of 'The Hunger Games: Mockingjay - Part 1' at Nokia Theatre L.A. Live on November 17, 2014 in Los Angeles, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
LOS ANGELES, CA - NOVEMBER 17: (EDITORS NOTE: This image has been converted from color to B/W). Actress Jennifer Lawrence arrives at the Premiere of Lionsgate's 'The Hunger Games: Mockingjay - Part 1' at Nokia Theatre L.A. Live on November 17, 2014 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)
NEW YORK, NY - NOVEMBER 12: Jennifer Lawrence arrives to 'Late Show With David Letterman' at Ed Sullivan Theater on November 12, 2014 in New York City. (Photo by James Devaney/WireImage)
NEW YORK NY - NOVEMBER 13: Jennifer Lawrence sighting on November 13, 2014 in New York City. (Photo by Josiah Kamau/BuzzFoto/FilmMagic)
BEVERLY HILLS, CA - OCTOBER 20: Actress Jennifer Lawrence speaks onstage at ELLE's 21st Annual Women in Hollywood Celebration at the Four Seasons Hotel on October 20, 2014 in Beverly Hills, California. (Photo by Michael Buckner/Getty Images for ELLE)
LONDON, ENGLAND - OCTOBER 13: Jennifer Lawrence attends the premiere for 'Serena' during the 58th BFI London Film Festival at Vue West End on October 13, 2014 in London, England. (Photo by Stuart C. Wilson/Getty Images for BFI)
LONDON, ENGLAND - OCTOBER 13: Jennifer Lawrence attends the premiere for 'Serena' during the 58th BFI London Film Festival at Vue West End on October 13, 2014 in London, England. (Photo by Stuart C. Wilson/Getty Images for BFI)
LONDON, ENGLAND - NOVEMBER 10: Jennifer Lawrence attends the World Premiere of 'The Hunger Games: Mockingjay Part 1' at Odeon Leicester Square on November 10, 2014 in London, England. (Photo by Mike Marsland/WireImage)
LONDON, ENGLAND - NOVEMBER 10: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME. MANDATORY CREDIT PHOTO BY DAVE M. BENETT/WIREIMAGE REQUIRED) Jennifer Lawrence attends the World Premiere of 'The Hunger Games: Mockingjay Part 1' at Odeon Leicester Square on November 10, 2014 in London, England. (Photo by Dave M. Benett/WireImage)
NEW YORK, NY - NOVEMBER 13: Jennifer Lawrence arrives to ABC's 'Good Morning America' in Times Square on November 13, 2014 in New York City. (Photo by James Devaney/GC Images)
LONDON, ENGLAND - NOVEMBER 10: Jennifer Lawrence attends the World Premiere of 'The Hunger Games: Mockingjay Part 1' at Odeon Leicester Square on November 10, 2014 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images)
SAN DIEGO, CA - JULY 20: (L-R) Actor Nicholas Hoult, actress Jennifer Lawrence and actor Michael Fassbender speak at the 20th Century Fox 'X-Men: Days of Future Past' panel during Comic-Con International 2013 at San Diego Convention Center on July 20, 2013 in San Diego, California. (Photo by Kevin Winter/Getty Images)
SAN DIEGO, CA - JULY 20: (L-R) Actors Hugh Jackman, James McAvoy, Michael Fassbender, Jennifer Lawrence and Nicholas Hoult speak at the 20th Century Fox panel during Comic-Con International 2013 at San Diego Convention Center on July 20, 2013 in San Diego, California. (Photo by Kevin Winter/Getty Images)
MONACO - MAY 25: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME. MANDATORY CREDIT PHOTO BY DAVE M. BENETT/GETTY IMAGES REQUIRED) Actors Nicholas Hoult (L) and Jennifer Lawrence attend a cocktail reception during Amber Lounge Fashion Monaco 2012 at Le Meridien Beach Plaza Hotel on May 25, 2012 in Monaco, Monaco (Photo by Dave M. Benett/Getty Images)
LAS VEGAS, NV - SEPTEMBER 19: Actress Jennifer Lawrence (C) and Chris Martin (background)attends the 2014 iHeartRadio Music Festival at the MGM Grand Garden Arena on September 19, 2014 in Las Vegas, Nevada. (Photo by Isaac Brekken/Getty Images for iHeartMedia)
LOS ANGELES, CA- NOVEMBER 18: Actress Jennifer Lawrence arrives at the Los Angeles premiere of 'The Hunger Games: Catching Fire' at Nokia Theatre L.A. Live on November 18, 2013 in Los Angeles, California.(Photo by Jeffrey Mayer/WireImage)
NEW YORK, NY - NOVEMBER 20: (L-R) Elizabeth Banks, Jennifer Lawrence, and Jena Malone attend the 'Hunger Games: Catching Fire' New York Premiere at AMC Lincoln Square Theater on November 20, 2013 in New York City. (Photo by D Dipasupil/FilmMagic)
PARIS, FRANCE - JULY 7: Chief Executive at Dior Sidney Toledano with Actress Jennifer Lawrence wearing Dior day 2 of Paris Haute Couture Fashion Week Autumn/Winter 2014, on July 7, 2014 in Paris, France. (Photo by Kirstin Sinclair/Getty Images)
PARIS, FRANCE - JULY 7: Actress Jennifer Lawrence wearing Dior day 2 of Paris Haute Couture Fashion Week Autumn/Winter 2014, on July 7, 2014 in Paris, France. (Photo by Kirstin Sinclair/Getty Images)
PARIS, FRANCE - JULY 07: Jennifer Lawrence attends Christian Dior show as part of Paris Fashion Week - Haute Couture Fall/Winter 2014-2015 at on July 7, 2014 in Paris, France. (Photo by Antonio de Moraes Barros Filho/WireImage)
LOS ANGELES, CA - JANUARY 18: Actresses Jennifer Lawrence (L) and Lupita Nyong'o attend the 20th Annual Screen Actors Guild Awards at The Shrine Auditorium on January 18, 2014 in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images)
BEVERLY HILLS, CA - JANUARY 12: 71st ANNUAL GOLDEN GLOBE AWARDS -- Pictured: Actress Jennifer Lawrence arrives to the 71st Annual Golden Globe Awards held at the Beverly Hilton Hotel on January 12, 2014 -- (Photo by Christopher Polk/NBC/NBC via Getty Images)
LOS ANGELES, CA - JANUARY 18: Cuba Gooding Jr. and Jennifer Lawrence (R) arrive at the 20th Annual Screen Actors Guild Awards at the Shrine Auditorium on January 18, 2014 in Los Angeles, California. (Photo by Dan MacMedan/WireImage)
LOS ANGELES, CA - JANUARY 18: Actress Jennifer Lawrence and Director David O. Russell arrive at the 20th Annual Screen Actors Guild Awards at The Shrine Auditorium on January 18, 2014 in Los Angeles, California. (Photo by C Flanigan/Getty Images)
LOS ANGELES, CA - JANUARY 18: Actresses Jennifer Lawrence (L) and Lupita Nyong'o attend the 20th Annual Screen Actors Guild Awards at The Shrine Auditorium on January 18, 2014 in Los Angeles, California. (Photo by Kevin Mazur/WireImage)
BEVERLY HILLS, CA - JANUARY 12: 71st ANNUAL GOLDEN GLOBE AWARDS -- Pictured: Actress Jennifer Lawrence arrives to the 71st Annual Golden Globe Awards held at the Beverly Hilton Hotel on January 12, 2014 -- (Photo by Christopher Polk/NBC/NBC via Getty Images)
NEW YORK, NY - DECEMBER 08: (L-R) Actors Christian Bale, Jennifer Lawrence, Bradley Cooper and Jeremy Renner attend the 'American Hustle' cast photocall at Crosby Street Hotel on December 8, 2013 in New York City. (Photo by John Lamparski/WireImage)
LAS VEGAS, NV - SEPTEMBER 19: Actress Jennifer Lawrence attends the 2014 iHeartRadio Music Festival at the MGM Grand Garden Arena on September 19, 2014 in Las Vegas, Nevada. (Photo by Isaac Brekken/Getty Images for iHeartMedia)
HOLLYWOOD, CA - MARCH 02: Jennifer Lawrence attends the Oscars at Hollywood & Highland Center on March 2, 2014 in Hollywood, California. (Photo by Christopher Polk/Getty Images)
Nominee for Best Supporting Actress in 'American Hustle' Jennifer Lawrence arrives on the red carpet for the 86th Academy Awards on March 2nd, 2014 in Hollywood, California. AFP PHOTO / Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)
LOS ANGELES, CA - JANUARY 18: Actress Jennifer Lawrence attends the 20th Annual Screen Actors Guild Awards at The Shrine Auditorium on January 18, 2014 in Los Angeles, California. (Photo by Alberto E. Rodriguez/Getty Images)
PARIS, FRANCE - JULY 07: Actress Jennifer Lawrence attends the Christian Dior show as part of Paris Fashion Week - Haute Couture Fall/Winter 2014-2015. Held at Musee Rodin on July 7, 2014 in Paris, France. (Photo by Rindoff/Dufour/French Select/Getty Images)
LOS ANGELES, CA - NOVEMBER 17: Actresses Jennifer Lawrence (L) and Elizabeth Banks attend the premiere of Lionsgate's 'The Hunger Games: Mockingjay - Part 1' at Nokia Theatre L.A. Live on November 17, 2014 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)
LOS ANGELES, CA - NOVEMBER 17: Fan Chelsea Boyce (L) takes a Wide Angle Selfie with actress Jennifer Lawrence using the new Samsung Galaxy Note 4 at the release of The Hunger Games: Mockingjay - Part 1 on November 17, 2014 in Los Angeles, California. (Photo by Michael Buckner/Getty Images for Samsung)
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Jennifer Lawrence and Joan Rivers may have made some digs at each other when the comedian was alive, but upon meeting Melissa Rivers, the actress says that was all water under the bridge.

In Nov. 2013, during a Q&A with Yahoo employees, Lawrence slammed Joan's show Fashion Police, which her daughter is now co-hosting.

"There are shows like The Fashion Police that are just showing these generations of young people to judge people based on all the wrong values and that it's OK to point at people and call them ugly or fat," she proclaimed. "They call it 'fun' and they say 'welcome to the real world' -- and that shouldn't be the real world, it's going to continue being the real world if we keep it that way. We have to stop treating each other like that and stop calling each other fat."

After Lawrence's choice words about the program, Joan told The New York Post in Dec. 2013, "My New Year's resolution is [ensuring] Jennifer Lawrence grows up and realizes how lucky she is and calms down."

WATCH: The Real-Life Inspiration for Joy Says Jennifer Lawrence's Portrayal Is 'Perfect'

On Monday's Watch What Happens Live, the Oscar winner admitted that she was nervous to meet Joan's only daughter when they were both filming Joy. Melissa portrays her late mother in the movie.

"I wondered if it was going to be uncomfortable," Lawrence told host Andy Cohen. "I really do love Joan Rivers. She's had such an incredible life and is an unbelievable woman. I just am very opinionated, too."

The 25-year-old actress decided to approach the situation with lots of kindness. "I don't think we would have had a beef had we (me and Joan) met," she explained. "So, I said that to [Melissa], and [was] complimentary of her mom, and kind of got it out of the way immediately. And then it wasn't [uncomfortable]."

WATCH: Jennifer Lawrence Reveals She Made Out With Liam Hemsworth

When Melissa was on Howard Stern's Sirius radio show in May, she admitted that she too felt uneasy about meeting The Hunger Games leading lady. "I just had an amazing experience with Jennifer Lawrence who, at the end, was quite publicly against Fashion Police and something that had been said," she shared. "We were in a very personal situation and I was like 'Oh my god, it's going to be a horrible evening.'"

The 47-year-old TV personality recalled that Lawrence was very complimentary of her mother. "She comes up to me and she says 'I know your mom and I had some differences at the end' -- and it wasn't even over something that she said -- 'but I got to tell you I loved her and she was funny,'" Joan's daughter recounted.

EXCLUSIVE: Melissa Rivers Reveals Where She Scattered Her Mother Joan Rivers' Ashes

Melissa got quite candid with ET about playing her mother in David O'Russell's new movie, and said that the entire cast, Lawrence included, was "lovely and supportive."

"Jen and I talked for a few minutes and she actually quoted back a couple of her favorite jokes of my mom's to me," she shared.

Here's more of our exclusive, emotional interview with Melissa:

EXCLUSIVE: Melissa Rivers Tears Up Over Playing Her Late Mother in 'Joy'
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