<p><span></span><em>Life & Style</em> can exclusively reveal that <a href="http://dynamic.bauerpublishing.com/mt-search.fcgi?blog_id=2&tag=sienna miller&limit=20&IncludeBlogs=2"><strong>Sienna Miller</strong></a> is not only having a baby with <a href="http://dynamic.bauerpublishing.com/mt-search.fcgi?blog_id=2&tag=Tom sturridge&limit=20&IncludeBlogs=2"><strong>Tom Sturridge</strong></a> -- but she's also getting married!</p>
"They're engaged and really happy," a source close to the couple reveals to Life & Style. "Her family is happy, as they absolutely adore Tom."
The source also reveals to Life & Style the details surrounding the big engagement and fabulous ring, and Tom made sure the moment was perfect.
"He proposed to Sienna during their romantic trip to Paris after Christmas. He filled their hotel suite at the Ritz with flowers and presented her with a vintage Victorian ring.
"It was incredibly romantic -- she was blown away," the source adds.
The actress hasn't stopped smiling since.
"She finally found the love of her life in Tom and couldn't be happier," the source tells Life & Style. "She trusts Tom and is herself with him.
"There's no drama between them -- they're made for each other," the source adds.
As for motherhood, Sienna is ready for all of it.
"She can't wait to be a mother," the source tells Life & Style. "The couple are over the moon with the news of the pregnancy."
The two were spotted on a double date with Tom's pal and Twilight star Robert Pattinson and Rob's girlfriend, Kristen Stewart, at London's Groucho Club in September.
The Factory Girl star had an on-and-off romance with fellow Brit Jude Law, 39, for more than seven years until they finally called it quits in 2011. They were engaged in 2004 but first split two years later.
Tom has been linked to actresses Camilla Belle and Carey Mulligan in the past.
Sienna, 30, and Tom, 26, are expecting their first child in June.
Congratulations to the happy couple!