The seventh series of Ex on the Beach, a British television programme is expected to begin on 20 June 2017 on MTV. The series was confirmed on 26 February 2017. The group of cast for this series include Geordie Shore stars Chloe Ferry and Marty McKenna, Love Island contestants Max Morley and Josh Ritchie, as well as Beauty School Cop Outs cast member Savannah Kemplay. Star of series five David Hawley also featured in this series. Marty and Josh had also previously appeared in the third and sixth series of the show respectively.

Based on this passage, when does ex on the beach series 7 start? Let's think fast. Stream of consciousness:
The relevant sentence in the passage is: The seventh series of Ex on the Beach, a British television programme is expected to begin on 20 June 2017 on MTV. So the final answer is 20 June 2017.