Vasillev came on for the final 25 minutes at Brighton and Hove Albion with Villa 1-0 down and helped them rescue a point as his run opened up the chance for Jack Grealish to score a late equalizer.
The lively attacking midfielder/forward has excelled in Villa's reserve side after his arrival in England in the summer of 2018 following impressive displays for the U.S. youth national teams.
With Villa struggling with injuries up top after main striker Wesley went down with a season-ending injury early this month, Smith is clearly ready to put his faith in Vassilev.
"He is definitely ready to start," Smith said. "The kid's a bright spark, and we've seen that when he's come on so far. He gave them (Brighton) problems on Saturday when he came on. It was a super ball from Douglas but, unless Indi makes that run down the side, he doesn't drag Webster across, and Jack get in for the goal. He knows what he's doing up there, he's got a lot of pace, and he can run all day as well."
Villa's boss didn't stop there though, as he also revealed that the young striker born in Savannah, Georgia has the backing of the senior players around him to go on and become a regular contributor in the Premier League.
"I've never been afraid to go and put young kids in if I feel they're ready. I congratulated him after the game and said, 'You're a Premier League player now.' He's surprised me in a good way," Smith added. "Sometimes when you give an opportunity to a young player they can sink or swim. He is certainly a swimmer. He has looked really good so far. You can always tell how the reaction is through the other players, in their relationships with them. You can see them all behind him. He goes in and puts a shift in for them. If you do that and have quality to add to it you will do alright in the dressing room. He's got a goalscoring ability, he knows where the back of the net is, he knows what runs to make. Tactically he's intelligent. Physically he's impressive as well."
Vassilev comes from a long line of soccer players and his father, grandfather and great-grandfather all played in Bulgaria and he was born and raised in the USA after his parents emigrated from the eastern European country in the early 1990s.
It looks like the USMNT have another top talent breaking through in Europe which is great news for Gregg Berhalter and potentially even better news for Villa as they badly need a forward to deliver goals in their fight against relegation from the Premier League.
Expect to see more cameos, and maybe even starts, from Vassilev in the final months of the Premier League season.