The pair were spotted smooching the day after their stunning appearance at the Costume Institute Gala Benefit at the Metropolitan Museum of Art in New York on Monday night.
And for dessert... Jude Law leans in to lock lips with Sienna Miller over lunch in New York on Tuesday
The pair have proved inseparable in recent weeks amid rumours they are set to get engaged again.
But last night Law did manage to drag himself away from the blonde starlet long enough to make a solo appearance at a Tony Awards press reception.
The actor, who was wearing his favourite pair of nude suede shoes, is nominated in the lead actor category for his role in Hamlet.
The couple are expected to return to London later this week.
Going strong: The recently reunited pair dined together at Pastis restaurant
However, she has made plans to make sure their life together starts on a fresh note - starting with an expensive refurbishment of the five-bedroom, four-storey Georgian property.
Miss Miller has even recruited the services of her former stepmother, interior design to the rich and famous, Kelly Hoppen.
A source close to the pair told the Mail: 'Kelly is overseeing everything on the London house - the lighting alone is a fortune.
'The design is all based on a palette of browns, greys and creams. Kelly calls it luxury minimalism.
'Jude has slightly moaned that he is going to be living in a top hotel, rather than a home and is more a fan of shabby chic – but Sienna is taking the reigns on this one.'
Miss Miller broke off her engagement to Law, 37, after he admitted having a fling with his children’s nanny Daisy Wright.
The actress went on to enjoy a torrid series of relationships, with Welsh actor Matthew Rhys and then a serious romance with his fellow countryman, actor Rhys Ifans.
The pair split in 2008 and Miss Miller said: 'I really thought I was very ready to settle down, but then I realised I wanted to be selfish for just a little bit longer.'
After her relationship with Ifans ended, Miss Miller began a relationship with married father of four, actor Balthazar Getty.
Meawhile, Law was also no stranger to the spotlight as American model Samantha Burke gave birth to his daughter Sophia last September, the product of a brief affair.
Despite this, Miss Miller and Law remained close and as the Mail revealed, they rekindled their romance last year while both starring in plays in New York.
They then spent Christmas – and their birthdays together – while on holiday in the Caribbean with Law’s children.
Return to the spotlight: The couple arrives at the high-society Met gala on Monday night
The Little Venice home is just a few miles from Law’s ex-wife Sadie Frost, who lives in their former marital home in Primrose Hill with their three children, Rafferty, 13, Iris, nine, and Rudy, seven.
The source added: 'Jude and Sienna are in love, they have both grown up a lot and want to do everything they can to make things work.
'All the signs are pointing to marriage – they would not be back together if they did not think they were serious about each other.
'The best thing for Jude is that Sienna loves his children and they love her. Now that they are living together again, expect an engagement soon.'