Jon Hamm & Jennifer Westfeldt Spark Rumors They're Back Together

Jon Hamm Back Together With Ex Jennifer Westfeldt?

Go Behind the Scenes of ’Top Gun: Maverick’ With Tom Cruise (Exc…

Jon Gosselin Wants a Reunion With Ex-Wife Kate and Family as He …

Jennifer Grey Claims Ex Johnny Depp Was 'Crazy Jealous and Paran…

Miles Teller and Glen Powell Share Details on ‘Top Gun: Maverick…

Jennifer Grey Looks Back at Career and Previous Relationships (E…

Lil Jon on Why He Started Doing Home Renovations With New HGTV S…

Heather Rae Argues With Tarek El Moussa's Ex Christina Hall

Blac Chyna vs. Kardashians: Kylie Jenner Testifies, Says Tyga Wa…

Jon and Kate Gosselin's Daughter Hannah Shares Why She Chose to …

'90 Day Fiancé': Mike's Mom Moves in With Him as He Defends His …

'Doubling Down With the Derricos’: Darian Celebrates 16th Birthd…

Selena Gomez and Jennifer Stone Reenact 'Crazy Hat' From 'Wizard…

‘90 Day Fiancé’: Bilal Tests Shaeeda's Loyalty and It Completely…

Johnny Depp vs. Amber Heard: Actor Questioned About Sabotaging A…

Zendaya and Tom Holland Show PDA in Boston

Ashley Graham Shows Off 'New Tummy' Months After Giving Birth

Megan Fox Details 'Blood-Drinking Ceremonies' With Machine Gun K…

Randy Jackson Reveals Which Celebs He’d Like to See on ‘Name Tha…
New photos have us wondering if Jon Hamm and Jennifer Westfeldt are back on.
Following the estranged couple's announcement in September that they were separating after 18 years together, the Daily Mailgot exclusive photos of Jon, 44, and Jennifer, 45, as they arrived at an event honoring the late director Mike Nichols on Sunday night in New York City.
WATCH: Why Jon Hamm and Jennifer Westfeldt Split After 18 Years
The two walked arm-in-arm as they strolled into the IAC building in Manhattan where Nichols' widow Diane Sawyer hosted.
This marked the first time the couple has been seen in public together since the split announcement, but they have broken up and reconciled before, making it seem more plausible that they could settle their differences again.
In March, Jon completed treatment in a rehab facility, where he sought help in battling an alcohol addiction. During that time, Jennifer stood by side.
WATCH: Jon Hamm Breaks Silence Post-Rehab, Talks 'Mad Men' Movie Possibility
"With the support of his longtime partner Jennifer Westfeldt, Jon Hamm recently completed treatment for his struggle with alcohol addiction," his rep told ET about his 30-day stay.
Jon and Hamm first began dating in 1997, but have never married and have no children.