As for Miley, the source says: ‘She has many amazing qualities, but as a couple she and Liam just stopped meshing. It happens.
‘He’ll always have fond memories of Miley, but right now Liam needs a calming presence in his life and Isabel fits the bill perfectly.’
Isabel Lucas, who is believed to be a longtime friend of the star, may now be feeling the ire of scorned Miley.
The story comes as sources tell US publication Life & Style that things have since ‘turned toxic’ between the exes - even allegedly becoming 'the nastiest divorce ever'.
The magazine outrageously alleges things have gotten so bad between the duo that Miley has been sending nasty messages to her ex.
‘Miley’s been sending Liam vicious texts and emails filled with insults because she refuses to accept full responsibility for the breakdown of their marriage,’ says the US publication's source.
‘Now lawyers are involved and things are turning nastier than ever. Miley expected Liam to wait a while before filing, but he’s done the complete opposite. What started off as an amicable separation is turning into one of Hollywood’s biggest showdowns of the year!’ the insider claims.
The publication does not provide examples of the alleged messages, and Miley has yet to comment on the magazine’s sensational claims.
WATCH: Miley Cyrus takes dig at Liam during 'Slide Away' performance Away" at the 2019 MTV VMAs