Ashton Kutcher and Mila Kunis are "pretty much joined at the hip."

The rumoured Hollywood couple were pictured kissing at a wrap party for Ashton's upcoming feature Jobs.

It's said that Kutcher and Kunis, who have been friends since acting alongside each other in TV series That 70's Show over a decade ago, can't get enough of one another.

"They're basically living together," a source told British newspaper The Sun.

"Like any new couple in love, they're pretty much joined at the hip.

"They're staying with each other most nights. Mila's practically moved in to Ashton's Hollywood home."

Apparently the couple have been covertly seeing each other for a substantial amount of time.

"They've been sneaking around for months but there's only so long you can keep it quiet," the source explained.

Actress Demi Moore split with Kutcher after six-years of marriage last fall and was admitted to rehab shortly thereafter.

Now released, Moore is reportedly shattered by her estranged husband's new romance with Kunis.

Neither Kutcher nor Kunis have publicly confirmed their relationship.

- Cover Media