The past and present Mrs. Tom Cruises apparently tried to dodge each other when they came face-to-face at Hollywood private members club Soho House.
A source told Life & Style magazine: ''When Katie walked upstairs to the lounge, she saw Nicole and immediately looked away like she was trying very hard to avoid eye contact with her. It was like she was taken off guard - it was like a standoff!
''They didn't even say hi. It was so awkward! She [Nicole] just looked at Katie, then looked away. But after Katie noticed Nicole in the lounge, she quickly walked to the patio area.''
Nicole and Tom's adopted children Isabella, 19, and Connor, 17, chose to live with him following their parent's 2001 divorce, and even call his current wife Katie 'mom'.
The former 'Dawson's Creek' star - whose rep denied the snub - previously claimed: ''His first two children are incredible, really smart and kind. They call me Mom.''
Nicole - who now has daughters Sunday Rose, three, and Faith, one, with country singer husband Keith Urban - insists she respects their decision.
She told Hello! magazine: ''They live with Tom, which was their choice. I'd love them to live with us, but what can you do?''