This honour comes after Horne became the first player to play 50 consecutive tournaments in the series when he represented the Blitzbokke at the London Sevens over the weekend.
It's also the first time a Dream Team has been picked to highlight the impact of seven special players. The side was selected by the regular television commentators who, between them, watched every minute of the action across the nine rounds.
Horne has won 10 tournaments with the Blitzbokke and was a member of the 2008/09 squad that won the series for the first time.
He was victorious in Adelaide (2008, 2009), Dubai (2008), George (2008), Las Vegas (2011, 2013), London (2011), Edinburgh (2011), Tokyo (2013) and Glasgow (2013).
New Zealand, who won the London Sevens, were crowned 2012/13 series winners, with South Africa finishing second.
2012/13 Sevens World Series Dream Team:
1. Afa Aiono - Samoa
2. Frankie Horne - South Africa
3. Tim Mikkelson - New Zealand
4. Joji Ragamate - Fiji
5. Gillies Kaka - New Zealand
6. Willie Ambaka - Kenya
7. Dan Norton - England
Results on Sunday in the London Sevens at Twickenham, the last leg of the Sevens World Series:
Cup
Quarter-finals
New Zealand 52, Argentina 7
Kenya 20, Fiji 7
Australia 24, United States 19
England 19, South Africa 14, ET
Semi-finalsNew Zealand 7, Kenya 0
Australia 14, England 7
Third place playoffEngland 26, Kenya 19
FinalNew Zealand 47, Australia 12
PlateSemi-finals
Fiji 26, Argentina 12
United States 22, South Africa 5
FinalFiji 14, United States 5
BowlSemi-finals
Wales 21, Samoa 12
France 28, Canada 14
FinalWales 19, France 7
Final series standings:
1. New Zealand, 173 points
2. South Africa, 132
3. Fiji, 121
4. Samoa, 104
5. Kenya, 99
6. England, 92
7. Wales, 91
8. Australia, 89
9. France, 87
10. Argentina, 84