Julia Roberts has reportedly made her last movie and will quit acting after appearing on Broadway next year (06) so she can spend time with her baby twins.

The Oscar winner recently went back to work for the first time after giving birth to PHINNAEUS and HAZEL last November (04), appearing in a music video for rocker Dave Matthews.

She has only done voiceover work - for animated movies Charlotte's Web and ANT BULLY - since wrapping 2004 movie OCEAN'S TWELVE.

Roberts will spend the rest of the year (05) preparing for her theatre debut in THREE DAYS OF RAIN which opens next March (06) - and then retire from acting for good.

According to sources close to the star, 37-year-old Roberts has had enough of acting, wants to enjoy time with the twins and husband DANNY MODER - but she has just one more career goal left to achieve.

A friend tells the National Enquirer, "Julia is done with Hollywood and starring in a Broadway play is the chance to make a graceful exit.

"She's been talking about leaving Los Angeles and stopping the movie roles ever since the twins were born late last November.

"She wanted a change of scenery, a change of pace and a new challenge."

On her Broadway ambitions, the source adds, "She wants to take some chances. Julia doesn't to be known simply as a movie star - she wants to be known as the consummate actress.

"She wants her kids to be able to look back on her career as something more than just the star of Pretty Woman."