Sources claim that Sienna and Lucas “hit a rough patch” before the engagement rumors started swirling. They were last seen together in August.
Another insider claimed that they are done, but that Miller will bounce back because “she is awesome.”
Miller recently shared her thoughts on getting married. She told The Sunday Times, “Yes, I would love to have more children. I would love a daughter as well. I think I would be open to getting married, yes.”
Sienna was previously linked to Tom Sturridge, but they called it quits in 2015 after four years together. They have remained on good terms as they raise 7-year-old daughter Marlowe.
Last year, rumors swirled about Sienna and Lucas after they were seen holding hands and kissing in NYC.