v3.26.1
Form N-1A Cover
Jul. 21, 2026
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name Themes ETF Trust
Entity Central Index Key 0001976322
Entity Investment Company Type N-1A
Document Period End Date Jul. 21, 2026
Prospectus Date Jul. 22, 2026