Rosario is Karen's feisty Salvadoran maid. She married Jack to get her green card; the two lived in the help's quarters of Karen and Stan's penthouse until Rosario divorced Jack to be with Gardener.
Episodes [61]: 01.22, 02.01, 02.02, 02.05, 02.12, 02.17, 02.18, 02.23, 03.01, 03.02, 03.03, 03.08, 03.11, 03.15, 03.22, 04.01, 04.04, 04.07, 04.08, 04.09, 04.13, 04.16, 04.25, 05.02, 05.06, 05.08, 05.09, 05.10, 05.16, 05.18, 05.22, 05.23, 05.24, 06.01, 06.14, 06.15, 06.16, 06.17, 06.22, 06.23, 07.04, 07.05, 07.11, 07.13, 07.14, 07.16, 07.17, 07.19, 07.22, 07.23, 08.01, 08.02, 08.05, 08.06, 08.10, 08.11, 08.12, 08.15, 08.18, 08.22, 08.23
Shelley Morrison became a regular cast member in Season 3.
Dr. Marvin "Leo" Markus, a sexy Jewish doctor, falls for Grace — ruining her and Will's plans to have a baby. After a two-month romance, Leo and Grace impulsively wed. Leo and Grace lived in Leo's apartment in Brooklyn.
Episodes [22]: 05.01, 05.02, 05.03, 05.05, 05.07, 05.08, 05.09, 05.11, 05.14, 05.20, 05.23, 05.24, 06.01, 06.02, 06.03, 06.05, 06.23, 07.01, 07.08*, 08.06, 08.16, 08.23
* #07.08: voice only
Will meets Vince by coincidence when Vince stops Will and Karen for speeding. Vince is friends with Joe and Larry, and they have been trying to set up Will and Vince for years. Will and Vince soon began dating.
Episodes [14]: 06.18, 06.19, 06.20, 07.02, 07.05, 07.07, 07.10, 07.12, 07.13, 08.13, 08.20, 08.21, 08.22, 08.23
After trying to steal Rosario and then showing up at the Walker's annual Valentine's weekend to taunt Karen for being alone, Karen's arch-rival showed up at the HRC gala with "business associate" Benji and tried to outbid her in the silent auction. He was in Vegas for Karen's wedding and confessed to Will that Karen Walker was "the one who got away." His rich wife Crystal finally passed in 2005.
Episodes [11]: 03.14, 04.15, 05.17, 06.03, 06.23, 07.15, 07.22, 08.07, 08.11, 08.17, 08.23
In Grace's dream, Warren is the son of Grace and Leo, raised by Grace with Will.
Episodes [1]: 08.23
Karen has been supporting her sister Gin since the childhood "accident" that left one of her legs 3/8" shorter than the other.
Episodes [1]: 08.22
Actor Josh Lucas auditioned for the part of Chuck Rafferty on "The Badge," but lost it to Jack.
Episodes [1]: 08.22
Ellen is Grace's friend and was also her college roommate. She often comes over for dinner and games with her husband, Rob. Rob and Ellen haven't been seen much since they got married and moved to New Jersey. Ellen had a baby boy in 2002, and by 2005 had three children.
Episodes [19]: 01.01, 01.10, 01.18, 01.21, 02.01, 02.03, 02.19, 03.08, 04.16, 04.17, 05.08, 05.09, 05.15, 05.16, 07.18, 08.04, 08.13, 08.15, 08.20
Larry and his partner Joe are two former party boy friends of Will and Jack's. They settled down in the South Hamptons and are raising a daughter, Hannah. They were married in 2001 in Vermont. Grace fixed him up with Will's father's mistress.
Episodes [14]: 03.03, 03.10, 03.17, 03.18, 04.12, 05.04, 05.08, 05.09, 05.15, 06.14, 07.05, 08.04, 08.15, 08.20
Rob is one of Will's friends who comes over for dinner, and to play poker and other games, like the home version of Pyramid, along with his wife Ellen. (They constantly lose to Will and Grace.) Rob and Ellen have two dogs, Harry and Ronnie, and three kids. Rob is also Will's accountant.
Episodes [16]: 01.01, 01.10, 01.18, 01.21, 02.01, 02.03, 02.19, 03.08, 03.17, 04.16, 04.17, 05.08, 05.09, 05.15, 08.13, 08.20
Will's mother, married to George Truman. They have three sons: Sam, Paul, and Will (her favorite). George and Marilyn decided to divorce in 2002. After the divorce became final in 2003, she became depressed and moved in with Will. After spraining her ankle, she was forced to stay with Will for a couple more weeks. In 2004, she invited Grace to her house for a tea party and Grace broke her favorite Lladro figurine.
Episodes [11]: 04.09, 04.18, 06.03, 06.04, 06.06, 06.21, 07.11, 07.21, 08.09, 08.19, 08.20
Zandra Zoggin is Acting Teacher Extraordinario. Jack brings Will to Zandra's "Acting On-Camera" class where Will lets his emotions flow and overcomes his fear of speaking on camera. After 5 years, Zandra finally tells Jack to get out. He defects from her class to start "The McFarland Method."
George is Will, Sam, and Paul's father. Will finds out that George had told all of his friends and co-workers that Will and Grace are married. George has been having a long-term affair with Tina. George and Marilyn decided to divorce in 2002.
After OutTV is bought out by a conservative right-wing company, they bring on Amber-Louise as Jack's co-host. She is secretly a hard-core lesbian named Peg, but is conforming to get ahead in the business.
Episodes [1]: 08.18
Star Trek star George Takei drops by "JackTalk" for an interview, but is told by Amber-Louise that he can not reveal that he is gay, prompting Jack to quit.
Episodes [1]: 08.18
When Grace's business gets too much to handle, she hires a second assistant, Pam, who makes Karen look like employee of the month.
Episodes [1]: 08.17
Travis was Jack's new cowboy boyfriend — until he hit on Will behind Jack's back.
Episodes [1]: 08.17
Will meets James when he shows up to the wrong theater. The two seemed to hit it off, but Will left to meet Grace. James later went looking for Will, but missed him. After learning that James is about to be deported to Canada, Grace proposes to him so that he can get a green card. The marriage is annulled the day after their wedding.
Elliot is Jack's biological son. Elliot's mother Bonnie used Jack's donation from the New York Family Clinic back in 1988. When Elliot was 12, he tracked down Jack. Desperate for Jack's attention, Elliot tried out for his high school cheerleading squad in 2004.
Episodes [11]: 03.22, 04.01, 04.03, 04.08, 04.09, 04.14, 04.20, 04.25, 05.12, 06.21, 08.14
Michael Angarano became a regular cast member in Season 4 (but only appeared in one episode each in Seasons 5, 6, and 8).
Tommy saw an episode of "Jack Talk" while on vacation with his parents in New York. After Jack read his fan letter, he travelled to Ohio to help him come out.
Episodes [1]: 08.13
Gary is an attorney at the Law Offices of Doucette and Stein. He accuses Will of kissing Mr. Stein's ass, while also playing tennis with the partners behind Will's back. His wife's name is Nicole. He competed with Will for a promotion to partner in 2005.
"Today" show host Matt Lauer was a guest at Karen's annual birthday bash.
Episodes [1]: 08.11
Ralph is a concession stand clerk working at the Sound of Music Sing-Along. He flirted with Jack and gave him free snacks.
Episodes [1]: 08.10
Jack and Will met Rose at the Central Park Zoo. She is a lesbian who was fighting for the gay penguins' rights.
Episodes [1]: 08.07
Brent was a flight attendant on Will and Grace's flight to London. Will flirted with Brent to get Grace into first class to see Leo.
Episodes [1]: 08.06
Bret was a flight attendant on Will and Grace's flight to London. Will flirted with Bret to get a blanket and cookie.
Episodes [1]: 08.06
"Baby" Glenn is famous for falling into a hole in the '80s. He was finally rescued after three days.
Episodes [1]: 08.05
Clyde is a lonely old man that Will meets while delivering food to elderly gay men. Fearing that he will end up like Clyde, Will invites him to game night.
Episodes [1]: 08.04
Dale is an acquaintance of Malcolm. He is a piano tuner with a nifty rent-controlled apartment in Staten Island.
Episodes [1]: 08.03