Stranger Things star David Harbour's telling two-word response when asked about Lily Allen split rumours

American actor David Harbour and his singer wife Lily Allen are rumoured to have split after tying the knot back in 2020.

And in a new interview with GQ, the Stranger Things star, 50, had a rather interesting response when the subject of his personal life and relationship was raised.

"Oh boy," Harbour responded, as the publication tellingly broached the topic as "the end of his relationship with pop star Lily Allen".

Watch the video above.

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He continued: "I'm protective of the people and the reality of my life.

"There's no use in that form of engaging [in tabloid speculation] because it's all based on hysterical hyperbole."

It comes after Not Fair singer Allen, 39, just months ago broke her silence after checking into a treatment centre amid split rumours.

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She made her comments on her BBC podcast, Miss Me?

"I just feel very grateful to have been given the time and the space that I needed," she began.

"I went into a sort of treatment center for a few weeks, which was great.

"I did a lot of group therapy and some individual therapy and I just, I needed some time and space away from everything.

"And I did a lot of shadow work... inner child stuff... it was not easy by any stretch and it's a lifelong journey of healing. But I've started mediating [and] that's really helping me."

Allen previously revealed she was taking a break from her podcast, admitting at the time that she was "not in a good place" mentally.

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In the podcast episode, the singer referred to Harbour as her "husband" still, keeping mum on the speculation over their relationship.

Speaking about stepping back from the podcast for a while, she said: "I'm going away next week, you're not going to hear me for a few weeks, listeners.

"There will be speculation, because of the amount of time that I'm going to be taking away, that I'm going to drug rehab, and I'm not. I've not relapsed."

If you or someone you know is in need of mental health support contact Lifeline on 13 11 14. In the event of an emergency dial Triple Zero (000).

If you or anyone you know is struggling with addiction contact the Alcohol Drug Information Service on 1800 250 015 or Narcotics Anonymous Australia on 1300 652 820.