WASHINGTON (AP) — Melania Trump announced Tuesday that Stephanie Grisham, her longtime spokeswoman and confidante, will succeed Sarah Sanders as White House press secretary.

Grisham has been with President Donald Trump since 2015, the year he launched his presidential campaign.

She will also take on the role of White House communications director, a strategic and forward-looking role that has been vacant since March, and will accompany Trump on a trip to Japan and South Korea that starts Wednesday.

The first lady announced the news on Twitter, saying she "can think of no better person to serve the Administration & our country."

"Excited to have Stephanie working for both sides of the @WhiteHouse," Mrs. Trump said.

Grisham worked directly for Trump after he took office in 2017. She was a deputy press secretary in the West Wing before she was tapped in March of that year to run communications for the first lady. She will continue to serve the first lady.

Sanders' last day at the White House is Friday.