Eagle-eyed fans noticed accused killer Nick Reiner in the background of one of Cynthia Bailey’s photos.

In May, the “Real Housewives of Atlanta” star took to Instagram to celebrate her ex Leon Robinson’s 64th birthday.

Bailey, 59, shared a throwback image of their daughter, Noelle Robinson, hugging the “Five Heartbeats” actor while they were out dining.

Several fans took to the comments section to point out the fact that Reiner could be seen at a nearby table in the top right of her snap.

“So y’all gonna act like Rob Reiners son isn’t in the background there?! Oh ok,” wrote one user.

“Is that Nick Reiner in the background?” asked another person.

“Is that Rob Reiners son in the background 😶,” commented a third netizen.

On Reddit, fans said it is “terrifying” to see Nick — who was charged with murdering his parents, Rob and Michele Reiner, last December.

“I think it is terrifying because he became a murder[er],” one user claimed. “The thought that a man in the background choose [sic] to kill both his parents in a violent knife attack can seem terrifying.”

It’s unclear when the image was taken.

Page Six has reached out to Bailey for comment but did not immediately hear back.

Last December, Michele and Rob were found stabbed to death in their Brentwood, California, home. He was 78 and she was 70.

The film director and his wife’s death certificates stated that they died within “minutes” of receiving “multiple sharp force injuries” with a “knife, by another.”

Nick — who was diagnosed with schizophrenia before the killings — was arrested and charged with two counts of first-degree murder for the deaths. He is facing a maximum sentence of life in prison without the possibility of parole or the death penalty.

In February, Nick pleaded not guilty to the double killings.

If you or someone you care about is affected by any of the issues raised in this story, call SAMHSA’s National Helpline at 1-800-662-HELP (4357).