Megan Mullally is being sued for allegedly running a red light and wrecking some woman's Mercedes back in 2009 -- but the ex-"
Will & Grace" star insists she's innocent ... TMZ has learned.

According to the legal docs filed in L.A. County Superior Court, both Megan and the other driver -- a lady named Wendy Kim -- sustained minor injuries during the crash ... but Wendy claims her Mercedes incurred most of the damage ... nearly $15,000 worth.
Now, Wendy's going after Megan in court -- demanding the actress cough up money to cover her repairs ... but so far, Megan has refused.
According to Megan, she doesn't owe squat -- claiming the light was yellow when she entered the intersection ... and Wendy's own "negligence" led to the collision.
The next hearing is scheduled for April.

We've learned
Megan Mullally was injured in a car wreck last week -- forcing her to cancel two performances of a play she's currently starring in.
Cops tell us the former "Will and Grace" star was involved in a two car accident at around noon last Wednesday in Beverly Hills.
We're told both parties complained of minor injuries -- cops say they have yet to determine who's at fault.
Mullally's injuries caused her to cancel Thursday and Friday's performances of her play "The Receptionist" at the Odyssey in Los Angeles -- but she was back on stage by Saturday ... accompanied by a brace on her wrist.
Lucky for Mullally, the play is currently on hiatus until October 3.
Our photog started a rumor that 49-year-old Megan Mullally, aka Karen Walker from "Will & Grace," was getting pumped by Playboy to show off her Anastasia Beaverhausen.
Eric McCormack was all for it -- but we want to know, are you?

Even before news hit that "The Megan Mullally Show" had been cancelled, Mullally's former "Will & Grace" co-stars wanted nothing to do with the doomed blabfest.
Sources tell TMZ that with her ratings already in the basement, Megan wanted to reunite the "W & G" cast on a special episode around her birthday, which fell during November sweeps. While Sean Hayes did appear in an episode that month, there was no getting Debra Messing or Eric McCormack aboard Meg's sinking ship. Iceberg!
In January, NBC cancelled the daily talker after airing fewer than 75 episodes. Although Messing guested on an early episode in September, Eric never did. Get out!
An NBC rep told TMZ, "We invited several people for that show. Some people could make it, others couldn't because of schedules."
Who needs "The Twilight Zone" when you've got The Zone? In our dimension of substance and shadow, a pop tart can turn into a bumpkin at the stroke of midnight, a billionaire can brawl with a lesbian, and celebs of all shapes and sizes can -- at any moment -- fall flat on their expensively exfoliated faces.
Marilyn Manson: Seven years of courtship, one year of marriage and now, apparently, an unknown number of irreconcilable differences. Playboy model and current make-up cover girl Dita Von Tiese is apparently letting the shock rocker know she no longer wants him to be her MAC daddy, leading wags to immediately speculate as to who will get custody of the eyeliner. There are also a couple of dogs and cats in the mix, but the real question for us is whether or not MM (aka Brian Warner) will be inspired to put his own hard-drinking, three-quarter beat spin on that old Barenaked Ladies classic. Let's all hum it together now: "Lying in bed, just like Brian Warner did..."
What's up with Omarion's new album? --
Kelly
Kelly, Omarion has a lot of work to do for his follow-up album, "21." The first single from the album is not doing well on the Billboard 100 right now, which is kind of a shock, considering his debut album "O" soared to number one. But he still has time to redeem himself. December 12, the CD hits stores, then he begins touring in Miami (with Ne-Yo) three days later to promote his sophomore release. Good luck!
For another hottie who got his start in a boy band,
check this out.

Megan Mullally is moving from
"Will & Grace" to her own daytime talk show and
she's hoping for some action from "The Bourne Identity" star Matt Damon.
"I wouldn't mind tapping into Matt Damon if you know what I mean, but I don't think that's really what you meant, that's a different show ... I'm sorry, my everything stopped when you said Matt Damon."
Though she's dropped her high pitch voice,
the Emmy winner is still just as funny as her former alter-ego "Karen," and she's hoping for a whole new audience for the talk show. "Prisoners, just strictly prisoners," she joked adding, "I think men might get a kick out of this show too because I'm gonna take my top off, that's the only reason."
"The Megan Mullally Show" premieres September 18.