Frances Bean Cobain's estranged husband is demanding $25,000 a month in spousal support.

TMZ reports that, according to Isaiah, the couple had no pre-nuptial agreement and he wants half of the money she made during their marriage.

He also claims he left a steady job when they tied the knot because Frances, who is worth more than $100 million, offered to look after his bills.

Frances gained access to a trust fund in August 2010 when she turned 18 which is said to have included 37 per cent of her late father's estate, following his suicide in 1994 aged 27.

She married the Eeries rocker in a secret ceremony in June 2014 but things came crashing down shortly afterwards and the raven-haired beauty filed for divorce earlier this year.

The pair, who don't have any children together, had been dating five years, four of which they were engaged for, before they got hitched away from the limelight.

Frances previously accused her estranged husband of stealing her late father Kurt Cobain's $1 million guitar.

Isaiah has claimed in legal documents that Frances gifted him the guitar, which Kurt used during the band's MTV Unplugged gig in 1993, as a wedding present but she has denied this allegation and now wants the iconic instrument back in her care.