diff --git a/shared-bindings/displayio/Bitmap.c b/shared-bindings/displayio/Bitmap.c
index 91c17f2d13..48d04c2157 100644
--- a/shared-bindings/displayio/Bitmap.c
+++ b/shared-bindings/displayio/Bitmap.c
@@ -178,9 +178,28 @@ STATIC mp_obj_t bitmap_subscr(mp_obj_t self_in, mp_obj_t index_obj, mp_obj_t val
     return mp_const_none;
 }
 
+//|   .. method:: fill()
+//|
+//|      Fills the bitmap.
+//|
+STATIC mp_obj_t displayio_bitmap_obj_fill(mp_obj_t self_in, mp_obj_t value_obj) {
+    displayio_bitmap_t *self = MP_OBJ_TO_PTR(self_in);
+
+    mp_int_t value = mp_obj_get_int(value_obj);
+    if (value >= 1 << common_hal_displayio_bitmap_get_bits_per_value(self)) {
+            mp_raise_ValueError(translate("pixel value requires too many bits"));
+    }
+    common_hal_displayio_bitmap_fill(self, value);
+
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_2(displayio_bitmap_fill_obj, displayio_bitmap_obj_fill);
+
 STATIC const mp_rom_map_elem_t displayio_bitmap_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_height), MP_ROM_PTR(&displayio_bitmap_height_obj) },
     { MP_ROM_QSTR(MP_QSTR_width), MP_ROM_PTR(&displayio_bitmap_width_obj) },
+    { MP_ROM_QSTR(MP_QSTR_fill), MP_ROM_PTR(&displayio_bitmap_fill_obj) },
+
 };
 STATIC MP_DEFINE_CONST_DICT(displayio_bitmap_locals_dict, displayio_bitmap_locals_dict_table);
 
diff --git a/shared-bindings/displayio/Bitmap.h b/shared-bindings/displayio/Bitmap.h
index 90694951fa..46c3373292 100644
--- a/shared-bindings/displayio/Bitmap.h
+++ b/shared-bindings/displayio/Bitmap.h
@@ -41,5 +41,6 @@ uint16_t common_hal_displayio_bitmap_get_width(displayio_bitmap_t *self);
 uint32_t common_hal_displayio_bitmap_get_bits_per_value(displayio_bitmap_t *self);
 void common_hal_displayio_bitmap_set_pixel(displayio_bitmap_t *bitmap, int16_t x, int16_t y, uint32_t value);
 uint32_t common_hal_displayio_bitmap_get_pixel(displayio_bitmap_t *bitmap, int16_t x, int16_t y);
+void common_hal_displayio_bitmap_fill(displayio_bitmap_t *bitmap, uint32_t value);
 
 #endif // MICROPY_INCLUDED_SHARED_BINDINGS_DISPLAYIO_BITMAP_H
diff --git a/shared-module/displayio/Bitmap.c b/shared-module/displayio/Bitmap.c
index 59971d25cc..2b0165f2f7 100644
--- a/shared-module/displayio/Bitmap.c
+++ b/shared-module/displayio/Bitmap.c
@@ -162,3 +162,35 @@ void displayio_bitmap_finish_refresh(displayio_bitmap_t *self) {
     self->dirty_area.x1 = 0;
     self->dirty_area.x2 = 0;
 }
+
+void common_hal_displayio_bitmap_fill(displayio_bitmap_t *self, uint32_t value) {
+
+    for (uint32_t x=0; x<self->width; x++) {
+        for (uint32_t y=0; y<self->height; y++) {
+            int32_t row_start = y * self->stride;
+            uint32_t bytes_per_value = self->bits_per_value / 8;
+            if (bytes_per_value < 1) {
+                uint32_t bit_position = (sizeof(size_t) * 8 - ((x & self->x_mask) + 1) * self->bits_per_value);
+                uint32_t index = row_start + (x >> self->x_shift);
+                uint32_t word = self->data[index];
+                word &= ~(self->bitmask << bit_position);
+                word |= (value & self->bitmask) << bit_position;
+                self->data[index] = word;
+            } else {
+                size_t* row = self->data + row_start;
+                if (bytes_per_value == 1) {
+                    ((uint8_t*) row)[x] = value;
+                } else if (bytes_per_value == 2) {
+                    ((uint16_t*) row)[x] = value;
+                } else if (bytes_per_value == 4) {
+                    ((uint32_t*) row)[x] = value;
+                }
+            }
+        }
+    }
+
+    self->dirty_area.x1 = 0;
+    self->dirty_area.x2 = self->width;
+    self->dirty_area.y1 = 0;
+    self->dirty_area.y2 = self->height;
+}