Washington (CNN) Former Democratic presidential candidate Marianne Williamson announced overnight Wednesday that she supports Andrew Yang's White House bid in the upcoming Iowa caucuses.

"I'm lending my support to Andrew in Iowa, hopefully to help him get past the early primaries & remind us not to take ourselves too seriously. We need that this year. We need to lighten up on a personal level, because the moment is so serious on a political level," Williamson wrote in a series of Instagram posts.

Williamson was clear in her post that she's not "endorsing anyone" in the race yet, and is simply supporting Yang through the Iowa caucuses.

Williamson also praised Sens. Bernie Sanders and Elizabeth Warren, writing that she admires both of them but that "right now they don't need my help" ahead of next month's caucuses.

The former candidate said Yang is defined by his "self-confidence, levity, and positivity," and that he is "light in tone, but he is deep in substance."