Reese Witherspoon's youngest child is officially a preteen — and she celebrated by sharing a rare photo of her lookalike son.

Reese Witherspoon had a sweet birthday tribute for 12-year-old son Tennessee—whom she shares with ex Jim Toth—thanking him ...

Reese Witherspoon shared a cute photo of her son, Tennessee, for his 12th birthday. See the sweet snapshot and her message to him, here.

Reese Witherspoon had a sweet birthday tribute for 12-year-old son Tennessee—whom she shares with ex Jim Toth—thanking him for making her "laugh everyday." ...

Reese Witherspoon was full of love for her youngest son Tennessee this week. Her son - who she shares with ex James Toth, 12 ...

Reese Witherspoon is proudly celebrating her youngest son Tennessee’s birthday with a special message. “Happy 12th Birthday ...

Reese Witherspoon shared a sentimental birthday tribute to her youngest son Tennessee James, whom she shares with ex-husband ...

Reese Witherspoon is proudly celebrating her youngest son Tennessee's birthday with a special message. "Happy 12th Birthday ...

Legally Blonde star Reese Witherspoon is a mom of three, sharing Ava and Deacon with ex Ryan Philippe, and her youngest son ...

Having been born in Louisiana and raised in Tennessee, Witherspoon found it easy to relate to her character. "No matter how ...

Mike Macdonald ...