The loans for both players run until 25 April and include recall options if required.
It is 20-year-old Fry's third spell away from Blues, with the defender having spent two previous stints with Leamington earlier in the campaign.
For 19-year-old Kelly, it is his second spell at Aggborough this season, having previously been with them in January when he made a solitary appearance in their FA Trophy second round defeat against Altrincham.
Both players were recently notified by Blues that they would not be offered new deals, when their existing ones comes to an end in the summer.
Having made an excellent start to the season, Kidderminster's form has slumped in recent months. They have failed to win any of their last nine league matches, a run which has seen them drop down into 13th spot in the table.
On Saturday Gary Whild’s side play host to Braintree Town, who are currently three points behind them in the division.