Kate Hudson doesn't have time to plan her wedding.

The 35-year-old actress has been engaged to Matthew Bellamy for three years and, although she's adamant they'll tie the knot at some point, she admits their hectic work schedules has put their wedding plans on the back burner.

When asked how she finds time to plan her wedding, she told E! News: ''You don't [have time to plan a wedding with a busy career], which is why I'm not [planning my wedding].

''We got a busy summer. We're really looking forward to it. I'm shooting a movie and so you know, we're doing a bunch this summer.''

Meanwhile, Kate - whose four-year relationship with the Muse frontman has been the subject of recent speculation they are on the rocks - believes it takes a lot of ''work'' to share life with another person, and thinks the secret to lasting commitment is to accept one another's flaws.

She said previously: ''Relationships are the most challenging things. It's where you do the most work in your life. You come face-to-face with yourself, and if you can deal with realising we're all flawed, accept it and work with it, you might have a really amazing, lasting relationship.''

However, the blonde beauty - who has son Ryder, 10, from her marriage to Chris Robinson and two-year-old son Bingham with Matt - thinks the way to make a relationship work seems ''simple'' but isn't so easy in practice.