Will Sienna Miller get to walk down the aisle at last?

Sienna Miller has got engaged to her toyboy lover – but she seems to be coy about sharing her good news.

The actress was spotted wearing a diamond ring last month but has since appeared eager to cover it up when around photographers.

However, friends have confirmed to The Mail on Sunday that Sienna, 38, said 'yes' when her 29-year-old boyfriend, Lucas Zwirner, popped the question last month.

Sparkle: The actress gives a rare flash of her diamond ring

Sparkle: The actress gives a rare flash of her diamond ring 

The couple, who began dating last year, are said to be blissfully happy together and have begun making plans for their .

It is the third engagement for Ms Miller, who previously agreed to marry both Jude Law and fellow actor Tom Sturridge, the father of her seven-year-old daughter, Marlowe.

However, she never tied the knot with either man.

She and Mr Zwirner, the editorial director of his father's art-based publishing house, David Zwirner Books, are understood to have moved in together in New York. A source said: 'Everyone is thrilled for Sienna – it's great to see her happy again.'

Soon after Mr Zwirner's proposal, Ms Miller was spotted wearing the diamond ring while walking in Manhattan, but it had vanished when she was later seen partying at the Golden Globe awards in Los Angeles.

Mr Zwirner, whose father is an art dealer and gallery owner, studied philosophy and literature at university. He has also worked as a translator and as an English teacher at a school in Harlem, New York.

Ms Miller has had a colourful love life. She accepted Law's marriage proposal on Christmas Day in 2004 but it later emerged that she had had an affair with her Layer Cake co-star Daniel Craig.

She and Law split when he issued a public apology for having an affair with his children's nanny, Daisy Wright. The pair briefly rekindled their romance in 2009 but split for good in 2011.

Ms Miller then dated film director Bennett Miller, with whom she worked on the 2014 movie Foxcatcher, followed by actor Balthazar Getty and Welsh star Rhys Ifans.

'Settled and happy': Sienna with fiance Lucas Zwirner, nine years her junior

'Settled and happy': Sienna with fiance Lucas Zwirner, nine years her junior 

She was also romantically linked to actor Josh Hartnett and rapper P Diddy, with whom she was seen cosying up to in Ibiza in 2007.

Despite a string of failed relationships, she recently admitted to being the marrying kind.

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