They're back!

Four former stars of NBC's Parks and Recreation had a beautiful reunion this week; Amy Poehler (Leslie Knope), Chris Pratt (Andy Dwyer) and Retta(Donna Meagle) joined Aubrey Plaza (April Ludgate) at the premiere of her new movie Ingrid Goes West in Hollywood.

Parks and Recreation aired on NBC between 2009 and 2015 and members of the cast has reunited sporadically over the years. Poehler, Rob Lowe (Chris Traeger) and Rashida Jones (Ann Perkins) got together to celebrate the Fourth of July in 2015, months after the series finale aired.

Whether it's a couple of years later or 20 years later, cast reunions never fail to make our hearts swell. Check out more TV stars who got together after their shows went off the air or after colleagues left, including the casts of shows such as ArrowGleeThe Fresh Prince of Bel-AirThe O.C., Gossip GirlDawson's Creek and Jersey Shore.

Parvati Shallow, Rob Cesternino, Sandra Diaz-Twine, Ozzy Lusth

Karis Fagley

Jenna Fischer, Angela Kinsey, Kate Flannery

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Shannen Doherty, Christine Elise, Jason Doherty, Gabrielle Carteris, Ian Ziering, Brian Austin Green, BH90210, Set, Instagram

Instagram / Shannen Doherty

Michael Rosenbaum, Tom Welling, Kristin Kreuk, Reunion, Smallville, Fan Expo Dallas 2019

Instagram / Michael Rosenbaum

Danielle Fishel, Pregnant, Ben Savage, Rider Strong, Will Friedle, Boy Meets World, Reunion, Dallas Fan Expo 2019

Instagram / Danielle Fishel

In Living Color reunion, Tommy Davidson, Shawn Wayans, Keenen Ivory Wayans, Kim Wayans, David Alan Grier

Mike Coppola/Getty Images for Tribeca Film Festival

Mark-Paul Gosselaar, Mario Lopez, Tiffani Thiesen, Elizabeth Berkley, Saved by the Bell, Reunion

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Jennifer Garner, Victor Garber, Ron Rifkin, Alias reunion

Instagram/Jennifer Garner

Courteney Cox, Lisa Kudrow

Instagram/Courteney Cox

Busy Philipps, Busy Tonight, Courteney Cox

Jordin Althaus/ E!

Buffy the Vampire Slayer

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Rose Abdoo, Anneliese van der Pol, Rondell Sheridan

Instagram

Wonder Years

Twitter

Donald Faison, Judy Reyes, Neil Flynn, Sarah Chalke, Zach Braff, Ken Jenkins, Scrubs

Vivien Killilea/Getty Images for New York Magazine

Kit Harington, Maisie Williams, Richard Madden

David M. Benett/Dave Benett/Getty Images for Coach

Courteney Cox, Lisa Kudrow

Alberto E. Rodriguez/Getty Images for UCLA Semel Institute

Yvette Nicole Brown, Gillian Jacobs, Joel McHale

Matt Sayles/Invision for Simone/AP Images

Tiffany Pollard, Flavor Flav

Instagram

Lost, Sonya Walger, Henry Ian Cusick, Reunion

Twitter

Hayden Byerly, Ella and Mia Allen, Xolo Mariduena, Parenthood Reunion

Carell Augustus

Josh Malina, Bradley Whitford, Janel Moloney, Aaron Sorkin, West Wing, Reunion

Instagram

Ben Savage, Matthew Lawrence, Instagram

Instagram

Murphy Brown, Candice Bergen

Instagram

Lucy Hale, Ian Harding, Pretty Little Liars, Reunion

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Parks and Recreation, Reunion, March for Our Lives 2018

Instagram

Sasha Pieterse, Brant Daugherty, Ian Harding, Keegan Allen

Instagram

ER, John Stamos

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Mark-Paul Gosselaar, Mario Lopez

Twitter

Zach Braff, Donald Faison, Scrubbs, Reunion, Cacie Cobb 40th Birthday Trip

Instagram

Emilia Clarke, Jason Momoa, Game of Thrones Reunion

Instagram

Darren Criss, Heather Morris

Lester Cohen/Getty Images for Saint John's Health Center Foundation

America Ferrera, Ugly Betty Reunion

Instagram

Brenda Song, Dylan Sprouse

Instagram

Josh Peck, Drake Bell

YouTube

Dadnapped, Emily Osment, Moises Arias, George Newbern, Phillip David Lewis

Nina Dobrev, Paul Wesley

Instagram

Smash, Debra Messing, Kat McPhee

Instagram

Amy Poehler, Aubrey Plaza, Rhetta, Chris Pratt

Michael Kovac/Getty Images for Neon

David Ramsey, Colton Haynes, Stephen Amell, Arrow, Comic-Con 2017

Instagram

Kevin McHale, Matthew Morrison, Becca Tobin

Joe Scarnici/Getty Images for Gilt

7th Heaven, Beverley Mitchell

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Jake T. Austin, Cole Sprouse

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Mariska Hargitay, Christopher Meloni

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Alfonso Ribeiro, Instagram

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Rachel Bilson, Chris Carmack

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Rachel Bilson, Jaime King, Wilson Bethel, Hart of Dixie Reunion

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Jack McBrayer, Rachel Dratch, TV Reunions

Bruce Glikas/ Planet Hollywood

Megan Mullally, Eric McCormack, Sean Hayes, Will & Grace

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Photos

See More From TV Cast Reunions That Made Our Nostalgia-Loving Hearts Swell

Earlier this year, Plaza talked to E! News about the possibility of a formal Parks and Recreation reunion.

"I do feel like someday we'll do like, some kind of messed up Parks and Rec movie," she said. "But it'll be rated R and we'll get to do all the things that we wanted to do but we couldn't do on network television."

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