Funnyman Martin Short, 73, and Oscar winner Meryl Streep, 74, insist they’re just pals. But tipsters tell Closer the Only Murders in the Building castmates are planning a cozy summer getaway together — and acquaintances suspect the seniors are actually friends with benefits!

“Actions are more powerful than words, and these two’s actions say there is something going on!” an insider squeals. “Let them label their ‘special’ relationship whatever they want. The indisputable truth is they are enjoying spending more and more time alone together.”