The Tron: Legacy star began dating Sudeikis in late 2011, and the funnyman proposed over the festive season (12).
Wilde has now revealed the wedding plans have stalled as they are both too busy with their current work projects.
She tells UsMagazine.com, "I don't know (what our plans are). I wish I knew. Right now, I'm just enjoying being engaged. I haven't had time to think about it. We've been too busy but we're very lucky to be busy so... that's the other side of it."
However, the actress does have a location in mind for the nuptials, revealing a "New York wedding would be ideal".
Wilde was previously married to Tao Ruspoli, but they divorced in 2011, while this will also be Sudeikis' second trip down the aisle. His marriage to screenwriter Kay Cannon ended in divorce in 2010.