Reese Witherspoon's son is ready to be the next Johnny Cash

She's one proud mama, who might not want her son, Tennessee, to grow up to be a cowboy, but he might grow up to be a country singer.

Reese Witherspoon, 38, shared an Instagram shot of  the 19-month-old crawling next to a guitar and captioned it:
"I Crawl the Line#johnnycash#startingearly#countryfan4life"
Of course, Reese won an Oscar playing June Carter Cash in Walk the Line.