Sienna Miller and Oli Green are taking a major step in their romance.

On the heels of welcoming their second baby together, the American Sniper actress and The Crown actor are now officially engaged.

Miller sparked engagement rumors when she stepped out in Spain sporting a massive diamond ring on that finger June 4. And E! News can confirm that it is, in fact, an engagement ring.

During the outing, Green appeared to put her ring on full display, sporting sunglasses, jeans and a jacket draped around her shoulders. The 44-year-old—mom to Marlowe, 13, with ex Tom Sturridge, as well as two younger children with Green—walked with her hands placed delicately in front of her, keeping her ring a focal point of her look. 

And while Miller and Green—who started dating in 2022—are taking a major step with their engagement, this year has already been major for them as they confirmed the arrival of their second baby last month.