The actress graces the cover of People's annual "50 Most Beautiful People" issue, on newsstands Friday. It is a record-breaking third time that Roberts has been the issue's cover girl.
"Now that she has her babies, she has reached the peak of beauty," the magazine quotes Roberts' friend and makeup artist Genevieve. "She is satisfied and content. All of that shows."
Roberts, 37, gave birth to twins Phinnaeus and Hazel with husband-cameraman Danny Moder; they are the couple's first children. It is her record ninth time on the list, a feat mirrored only by Halle Berry, who is also in the issue.
This year, People also polled online readers for their opinions. With over 500,000 votes cast, Brad Pitt and Angelina Jolie were the overwhelming winners of most beautiful man and woman. The two have recently been linked romantically by tabloid reports, though neither star has confirmed a relationship.
Also making the list are Jennifer Aniston, Oprah Winfrey, Lindsay Lohan, Jamie Foxx, Eva Longoria, Miami Heat basketball player Dwyane Wade and Mischa Barton.
Some famous couples were also chosen: model Heidi Klum and her fiance Seal, Penelope Cruz and Matthew McConaughey, and Jude Law and Sienna Miller.