Chrissy Teigen is slamming Melania Trump for her coronavirus response, saying the first lady is failing to "be best" during the pandemic.

The model and TV personality - who along with her husband, singer John Legend, is a frequent and vocal critic of President Trump - tweeted to her more than 12 million followers on Tuesday:

Trump - who launched her "Be Best" children's wellness initiative in 2018 - has shared multiple coronavirus-related messages via her Twitter account. Last week, the 49-year-old former model urged Americans to get information about coronavirus prevention through the Centers for Disease Control and Prevention and Department of Health and Human Services websites. On Tuesday, Trump encouraged followers working from home in an attempt to avoid the spread of COVID-19 to "work on your well-being."

"If we support one another through this challenging time, America will come out stronger in the end," Trump wrote on Wednesday.

Teigen's criticism appeared to be sparked by a March 5 tweet from Trump which showed her sporting a hard hat and examining blueprints for the development of a tennis pavilion on the grounds of the White House.

Trump had responded to the intense backlash to the tweet, writing:

It's not the first time that Teigen has publicly sparred with the Trumps.

Legend and Teigen fired back at the president last September after Trump had attacked them and others for not crediting him for passing criminal justice reform legislation.

"Imagine being president of a whole country and spending your Sunday night hate-watching MSNBC hoping somebody - ANYBODY - will praise you. Melania, please praise this man. He needs you," Legend wrote.

Teigen, to whom Trump referred as Legend's "filthy mouthed wife" without naming her, blasted the commander in chief by calling him a string of expletives.

"Tagged everyone but me," she tweeted. "An honor, mister president."