A high-profile E! host is accused of “engaging in an inappropriate relationship with an executive at the network for more than two years,” The New York Post’s Page Six reports, citing multiple sources.

Both the host, Morgan Stewart, and the executive, Bryce Kristensen, are married to other people, the story notes.

Stewart, who is married to her former “Rich Kids of Beverly Hills” co-star Brendan Fitzpatrick, is a co-host of the cable channel’s “E! News: Daily Pop” and also has her own late-night talk show, “Nightly Pop.”

The Post quotes a source at NBCUniversal saying: “I think the whole company knows. It was brought to the attention of [human resources] by multiple people because the behavior was so obvious.”

Stewart and Kristensen have both denied the allegations, but The Post reports that “after several E! employees came forward, the company reportedly decided to open an internal investigation.”

E! reportedly declined to confirm the investigation.

The Post adds: “Page Six asked Kristensen about the allegations, to which he responded, ‘Morgan and I have been friends and colleagues for years, and nothing more than that.’”

Morgan Stewart (Instagram)