The Daily Show host and Kelly are parting ways, a source told PEOPLE.
Over the weekend, the 37-year-old was seen partying in Miami with DJ Steve Aoki and David Grutman, while the 500 Days of Summer actress recently went on a Mexican vacation with pals and has been sharing the stunning pictures from her getaways on social media.
"Minka and Trevor have broken up," an insider also spilled to Entertainment Tonight. "Their work commitments and careers are very different and they both felt like they should take time apart."
The 40-year-old has been "leaning on friends, traveling and keeping busy since their split," the source said, while her now-ex "has been doing his own thing too."
The pair kept their relationship low-key and never publicly confirmed their romance. However, a source told PEOPLE in August that they were "very serious" and "very happy."
While their relationship made headlines in August, they were reportedly quietly dating a little longer than that.
"They're making plans for a future together, and it's a very stable relationship," a source said after Noah bought a six-bedroom Los Angeles home in December. "They've been spending time between coasts over the last year and had been looking for a place in L.A. as a couple."
Things seemed to be going very well. "They're very happy and it's a very serious relationship. Trevor is pretty private about who he is dating, so he is not going to announce it on social media or anything until the time is right," an insider said in September. The two were spotted for the first time together near Noah's apartment.
Noah previously said he was not keen on living with a partner again. "I think one of the reasons people get divorced or relationships break up is because of this cohabiting that we have come to believe that relationships are supposed to be," he told Howard Stern.
Neither Noah or Kelly have publicly commented on their reported split.