Mom Blabs About Sienna's Engagement

British actress Sienna Miller and Welsh actor Rhys Ifans have been keeping quiet about their relationship, especially when it comes to rumors of wedding bells. Sienna has even flat-out denied they're engaged. But Ifans's mum, Beti-Wyn Evans, has opened her mouth and said the two are headed for the altar. She told British newspaper The Sun, "They adore each other and I am so pleased for them. They make a fantastic couple. We think she is lovely, absolutely fantastic."

Let's hope Sienna feels the same about her future mum-in-law when she learns Beti-Wyn spilled the beans!

We've been hearing for a while about Rhys's repeated proposals to Sienna. First time was last August, when rumors had him sending her a cryptic note, written in Welsh, that read "Marry the Misfit." He tried again after her 26th birthday in December, when he hid the ring in a pile of gifts. Still, he was denied. Third time's the charm, apparently: The two are allegedly planning a summer wedding and looking for a home in Wales.

Was it smart of Sienna to keep her wedding plans on the downlow? Or does she just seem unsure of what she wants?