They have targeted a number of Boots stores throughout Rhondda, working with one another to steal make-up from the shops.
They enter the store together, and the male has been captured taking items from display counters while the woman shields him from staff members.
On one occasion they have got away with hundreds of pounds worth of goods.
Officers believe they may not be local and are travelling in from surrounding areas.
Anyone who thinks they recognise either person is urged to contact South Wales Police’s non emergency number 101 or call Crimestoppers on 0800 555 111