On 'Seinfeld's' 25th Anniversary: 25 Actors You Forgot Were on the Show

— -- intro: Today marks the 25th anniversary of the greatest sitcom that was "about nothing."

"Seinfeld" launched 25 years ago on July 5, 1989 and still resonates in pop culture lore, with quotes and episodes talked about today, almost 16 years after the series finale.

Aside from launching the careers of Jerry Seinfeld, Jason Alexander and Julia Louis-Dreyfus, the iconic show also featured a slew of other stars well before their prime. In honor of the milestone, here are 25 actors and actresses that you probably forgot were on the show:

(And yes, we realize there are probably hundreds of guest stars, so we tried to pick a good 25!)

quicklist: 1title: Kathy Griffintext: The comedian played Sally Weaver.media: 20486378

quicklist: 2title: Debra Messingtext: The "Will & Grace" star played Beth.

quicklist: 3title: Kristin Davistext: The "Sex & The City" star played a love interest of Jerry's.media:

quicklist: 4title: James Spadertext: "The Blacklist" star played a childhood friend of Jerry and George's.media: 24418823

quicklist: 5title: Jon Voighttext: Angelina Jolie's father played himself when George thought he bought his old car.media: 24053801

quicklist: 6title: Amanda Peettext: Peet played Linette, another love interest for Jerry.media:

quicklist: 7title: Courteney Coxtext: The "Friends" star played Meryl, another girlfriend of Jerry's.media: 24173511

quicklist: 8title: Jennifer Coolidgetext: Stifler's mom from "American Pie" played the masseuse, who Jerry wanted to get a massage from.media: 24418933

quicklist: 9title: Jeremy Piventext: The "Entourage" star auditioned to play George in his pilot for NBC.

quicklist: 10title: Denise Richardstext: Richards played Molly, the daughter of the chairman of NBC.media:

quicklist: 11title: Molly Shannontext: The "Saturday Night Live" vet played Sam.media:

quicklist: 12title: Lisa Edelsteintext: The "House" star played George's girlfriend. media: 24418775

quicklist: 13title: Mariska Hargitaytext: She was the girl who had chemistry with Jerry while auditioning to play Elaine on his pilot.media: 22858135

quicklist: 14title: Brad Garretttext: He played Jerry's mechanic.

quicklist: 15title: Marcia Crosstext: The "Melrose Place" star played a doctor yet again.media: 24418723

quicklist: 16title: Lauren Grahamtext: Graham played another love interest for Jerry.media: 24419040

quicklist: 17title: Catherine Keenertext: Keener played another love interest for Jerry, you get the point.

quicklist: 18title: Jon Favreautext: The "Iron Man" star played Eric the Clown, who argues with George.media:

quicklist: 19title: Michael Chiklistext: "The Shield" star played a friend of the gang.media: 24419115

quicklist: 20title: Bryan Cranstontext: Yep, even "Breaking Bad's" Cranston played Jerry's dentist.media:

quicklist: 21title: Megan Mullallytext: She played one of George's girlfriends.media: 24418639

quicklist: 22title: Teri Hatchertext: "They're real and they are spectacular." You know who Hatcher played.

quicklist: 23title: Debra Jo Rupptext: "That 70's Show" star played Katie.media: 24418886

quicklist: 24title: Anna Gunntext: Another "Breaking Bad" star, she played Amy.

quicklist: 25title: Marlee Matlintext: The Oscar winner played Laura.media: 24418591