Reese Witherspoon grinned big as she ran errands in Brentwood today. The actress has plenty of reasons to show off her infectious smile since she just celebrated her 35th birthday with family on Tuesday and is reportedly walking down the aisle this weekend. Her parents and siblings are already in town for the event, which will apparently take place at her home in Ojai. Preparations have begun on the property, and it looks like Reese is gearing up as well. She made a trip to the hair salon this week and has been sneaking in last-minute workouts. Reese can focus on her upcoming wedding for now, but next month will be all about Water For Elephants. She'll kick off promotion at the Academy of Country Music Awards, where she and Robert Pattinson will be presenters.