The scheming character was last seen in the ITV soap back in 2019 when Robert was imprisoned for killing his sister Victoria's rapist Lee Posner.
Actor Ryan Hawley is said to have already begun filming his scenes for what the paper described as a limited stint as Robert, meaning it won't be a permanent return.
They added: "Nothing was seen as being too extreme to keep the secret with fake names on scripts, smuggling him in and out of the studios and keeping everything very tight."
ITV declined to comment when approached by RadioTimes.com.
Fans will be aware that Aaron is currently engaged to marry Robert's long-lost half-brother John Sugden (Oliver Farnsworth) in the coming weeks, but is unaware of John's villainous true nature.
Most recently on screen, John was shown attacking boss Dr Liam Cavanagh (Jonny McPherson) and attempting to frame Liam's ex-girlfriend, Ella Forster (Paula Lane), in the latest of a long line of crimes.
Meanwhile, Cain Dingle (Jeff Hordley) is starting to ask questions about his son Nate's vanishing act.
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