Try the following:
dataGridView1.Columns.Add("columnName1", "Column 1 Header");
dataGridView1.Columns.Add("columnName2", "Column 2 Header");
var row1 = new DataGridViewRow();
row1.Cells.Add(new DataGridViewImageCell { Value = new Bitmap(@"C:\Path\to\image.jpg") });
row1.Cells.Add(new DataGridViewTextBoxCell { Value = "string" });
dataGridView1.Rows.Add(row1);
var row2 = new DataGridViewRow();
row2.Cells.Add(new DataGridViewTextBoxCell { Value = "string"});
row2.Cells.Add(new DataGridViewImageCell { Value = new Bitmap(@"C:\Path\to\image.jpg") });
dataGridView1.Rows.Add(row2);
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