The Ospreys under 16s booked their place in the final of the WRU Age Grade Championship courtesy of a bonus point victory over Blues North on Wednesday.
They will now face the Scarlets at St Helen's on Wednesday 10th February (KO 7.15pm), who pipped Blues South for the other place in the final.
The young Ospreys booked secured their final berth when they ran out as comfortable 35-3 victors at Llandarcy.
Lewis Montague gave the North an early lead with a penalty before the Ospreys cut loose and scored five tries, including two from the second row Dewi Parry.
His first helped the hosts into a 7-3 interval lead and after crossing for a second 10 minutes into the second half, the Ospreys made sure of maximum spoils with further tries from Matthew Jenkins, Evan Yardley and Sam M Davies.
Outside half Sam Davies kicked five conversions to put the icing on a fine team performance.