[roll] out the red carpet

to treat a guest whom one greatly values with extra care and attention

The idiom "roll out the red carpet" has its origins in ancient Greek and Roman traditions where red carpets were used to welcome and honor dignitaries and VIPs. In modern usage, it is used when giving a warm and special welcome or treatment to someone, typically a distinguished guest.

When the celebrity arrived at the movie premiere, the organizers rolled out the red carpet for a grand entrance.
The university rolled out the red carpet for the Nobel laureate, arranging a special ceremony in their honor.
The restaurant staff rolled out the red carpet for the food critic, offering a personalized dining experience.
The company spared no expense in rolling out the red carpet for their most important clients at the annual gala.
At the international summit, the host country went all out to roll out the red carpet for world leaders, ensuring a warm and dignified welcome.