Pablo Schreiber - Pornstache NBC Pablo Schreiber, who plays the much-hated prison guard nicknamed Pornstache, made multiple guest appearances in Season 15 of "SVU" as well as in the Season 14 finale as William Lewis. Lewis has a good amount of Pornstache's repulsive qualities, but he's way, way worse.

Kate Mulgrew - Red Hulu/NBC Kate Mulgrew may be hard to recognize out of her "OITNB" character Red's eponymous hair color, but this is indeed the actress in "Law & Order: SVU." Mulgrew made a cameo in Season 7, Episode 21, "Web."

Natasha Lyonne - Nicky Hulu/NBC Natasha Lyonne plays drug addict Nicky in "OITNB," but in her "SVU" guest role from Season 13's episode "Educated Guess," she's an even more troubled character living in a psychiatric ward.

Taryn Manning - Pennsatucky Hulu/NBC Taryn Manning is fantastic as the born-again Christian Pennsatucky in "Orange." In her cameo in a Season 12 "SVU" episode, "Possessed," she gives a stellar performance as a victim of rape.

Lea DeLaria - Big Boo Hulu/NBC Real-life comic Lea DeLaria plays Big Boo in "OITNB," an inmate with a penchant for creative (and sometimes gross) ways to give herself an orgasm. The real-life comic made a cameo in the Season 10 episode of "SVU" titled "Transitions."

Laverne Cox - Sophia Burset Hulu/NBC Laverne Cox plays the amazing Sophia Burset, a transgender inmate, in "Orange Is the New Black." Cox made two "Law & Order" cameos, first in "SVU" Season 9 episode "Closet," and later in the original series.

Barbara Rosenblat - Miss Rosa Hulu/NBC Barbara Rosenblat plays Miss Rosa in "OITNB," an inmate with cancer whose thrilling backstory we learn about in Season 2. Rosenblat made a cameo in the "SVU" Season 10 episode "Transitions" alongside "OITNB" co-star Lea DeLaria, and another in Season 6 episode "Rage."

Nick Sandow - Caputo Hulu/NBC Prison counselor Joe Caputo, or shall we say the bassist of "Side Boob" in "OITNB" Season 2, made a cameo in "SVU" Episode 17 of Season 7, "Class." It's pretty ironic that Sandow is behind bars in this photo, but he actually played an undercover agent.

Alysia Reiner - Natalie Figuroa, "Fig" Hulu/NBC Alysia Reiner's Fig is not the most likable character in "OITNB," although we do see a lot more of her telling backstory in Season 2. Reiner appeared in "SVU" Episode 9 of Season 4, "Juvenile."

Kimiko Glenn - Brook Soso Hulu/NBC We only just met Kimiko Glenn's character Brook Soso, one of the newest inmates in Season 2 of "OITNB." If you recognized her on "OITNB," it's likely because you saw her in a recent "SVU" episode, Thought Criminal," in which she goes undercover to catch pedophiles.

Constance Shulman - Yoga Jones Hulu/NBC Constance Shulman's Yoga Jones is one of the coolest characters on "Orange Is the New Black." Between Seasons 1 and 2 she made an appearance on "SVU" Season 15's "Wednesday's Child" as a day care manager.

Selenis Levya - Gloria Mendoza Hulu/NBC Selenis Levya, who plays Gloria Mendoza in "OITNB," had quite the "Law & Order" career before the Netflix series. Levya made an appearance in "Hysteria," the fourth episode of "SVU." However, she appeared first on the original "Law & Order" as Detective Rivera, a recurring role up until 2010. She also made three separate cameos on "Law & Order: Criminal Intent."

Elizabeth Rodriguez - Aleida Diaz Hulu/NBC Elizabeth Rodriguez plays Daya's mother, Aleida, on "OITNB," but she also made a guest appearance on "SVU" Season 13 episode "Home Invasions."

Michael Chernus - Cal Chapman Hulu/NBC On "OITNB" Michael Chernus plays Piper's hippie brother Cal, who uses vegetable oil instead of gas in his car. He appears alongside "OITNB" co-star Natasha Lyonne in the "SVU" episode "Educated Guess," in which he plays a patient in a psychiatric hospital ward.

Vicky Jeudy - Janae Watson Hulu/NBC In "OITNB," Vicky Jeudy plays inmate Janae Watson, the former high school track star. Between Seasons 1 and 2 of the Netflix show, Jeudy played Officer McKenna in the recent "SVU" episode "Amaro's One-Eighty."

Michelle Hurst - Miss Claudette Hulu/NBC Michelle Hurst played Miss Claudette in Season 1 of "OITNB," but did not reprise her role in the second season. Hurst has appeared in three "SVU" episodes, including Season 1's "The Third Guy," Season 2's "Legacy" and Season 4's "Desperate."

Annie Golden - Norma Hulu/NBC Annie Golden plays Red's right-hand woman, Norma, who never says a word in the show. Golden made a cameo in the Season 7 episode of "SVU" titled "Taboo," and has also appeared in the original "Law & Order."