A week after actress/designer Frost allegedly went on a Twitter tirade against ex-husband Jude Law's new love for taking their child for a haircut comes word that Miller has been banned from the ballet recital of Law and Frost's 9-year-old daughter Iris.
"Jude was bringing Sienna to the recital to support Iris, but Sadie has had enough and put her foot down and said she could not come," a source told the Daily Mail.
'Sadie is a great mum, she's just had enough of someone else playing mum with her children."
Frost was said to be furious last week when Twenty8Twelve designer Miller, according to initial reports, took Iris to a salon and got her hair bobbed.
"I think ya should get ya own child and then cut their hair!" she allegedly tweeted before the account was deleted. Frost, 45, denied the incident to the Daily Mail, saying, "The story in paper is rubbish, no-one cut Iris's hair, she still has her beautiful locks."
And that may be true: The Daily Mail reports today that it was Law and Frost's 7-year-old son Rudy -- not their daughter Iris -- who got the new 'do.
Adding to Frost's ire is the rumored upcoming wedding between 28-year-old Miller and Law. "Sienna is making all these plans for Sadie's children to be part of the wedding party," a source told the paper.
"Jude asked Sadie if she could have an informal meeting with Sienna to smooth over their relationship for the sake of the children -- but that was before Sienna took Rudy to have his hair cut."
Thirty-seven-year-old Law, who is also father to the Frost French designer's 13-year-old son, Rafferty -- has reportedly been consulting with celebrity jeweler Stephen Webster, Miller's favorite, about designing her wedding ring. Just don't expect Frost to show up at the bachelorette party.
As the source told the Daily Mail, "There are many things that Sadie is cross about at the moment"
In related news, see Sadie Frost and Kate Moss wearing opposite ensembles on Father's Day.